6361690660 has 72 divisors (see below), whose sum is σ = 14510399400. Its totient is φ = 2341767168.

The previous prime is 6361690619. The next prime is 6361690691. The reversal of 6361690660 is 660961636.

It can be written as a sum of positive squares in 12 ways, for example, as 1198405924 + 5163284736 = 34618^2 + 71856^2 .

It is a super-2 number, since 2×6361690660² = 80942216107062471200, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1176924 + ... + 1182316.

It is an arithmetic number, because the mean of its divisors is an integer number (201533325).

Almost surely, 2^6361690660 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6361690660, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (7255199700).

6361690660 is an abundant number, since it is smaller than the sum of its proper divisors (8148708740).

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

6361690660 is a wasteful number, since it uses less digits than its factorization.

6361690660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5777 (or 5762 counting only the distinct ones).

The product of its (nonzero) digits is 209952, while the sum is 43.

The square root of 6361690660 is about 79760.2072464710. The cubic root of 6361690660 is about 1852.9236129841.

The spelling of 6361690660 in words is "six billion, three hundred sixty-one million, six hundred ninety thousand, six hundred sixty".