6609690000 has 225 divisors, whose sum is σ = 23200650759. Its totient is φ = 1756080000.

The previous prime is 6609689959. The next prime is 6609690023. The reversal of 6609690000 is 969066.

The square root of 6609690000 is 81300.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in 2 ways, for example, as 518199696 + 6091490304 = 22764^2 + 78048^2 .

It is a tau number, because it is divible by the number of its divisors (225).

It is a super-2 number, since 2×6609690000² = 87376003792200000000, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 44 ways as a sum of consecutive naturals, for example, 24389865 + ... + 24390135.

Almost surely, 2^6609690000 is an apocalyptic number.

6609690000 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

6609690000 is the 81300-th square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6609690000

6609690000 is an abundant number, since it is smaller than the sum of its proper divisors (16590960759).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

6609690000 is an equidigital number, since it uses as much as digits as its factorization.

6609690000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 576 (or 281 counting only the distinct ones).

The product of its (nonzero) digits is 17496, while the sum is 36.

The cubic root of 6609690000 is about 1876.6950005905.

Multiplying 6609690000 by its sum of digits (36), we get a square (237948840000 = 487800²).

6609690000 divided by its sum of digits (36) gives a square (183602500 = 13550²).

The spelling of 6609690000 in words is "six billion, six hundred nine million, six hundred ninety thousand".