6660065490 has 128 divisors (see below), whose sum is σ = 17854566912. Its totient is φ = 1579253760.

The previous prime is 6660065479. The next prime is 6660065491. The reversal of 6660065490 is 945600666.

It is not an unprimeable number, because it can be changed into a prime (6660065491) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1484050 + ... + 1488530.

It is an arithmetic number, because the mean of its divisors is an integer number (139488804).

Almost surely, 2^6660065490 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6660065490, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (8927283456).

6660065490 is an abundant number, since it is smaller than the sum of its proper divisors (11194501422).

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

6660065490 is a wasteful number, since it uses less digits than its factorization.

6660065490 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4644.

The product of its (nonzero) digits is 233280, while the sum is 42.

The square root of 6660065490 is about 81609.2242948063. The cubic root of 6660065490 is about 1881.4506581108.

The spelling of 6660065490 in words is "six billion, six hundred sixty million, sixty-five thousand, four hundred ninety".