2656610664 has 32 divisors (see below), whose sum is σ = 6645408000. Its totient is φ = 885019392.

The previous prime is 2656610651. The next prime is 2656610669. The reversal of 2656610664 is 4660166562.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (2656610669) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10752 + ... + 73680.

It is an arithmetic number, because the mean of its divisors is an integer number (207669000).

Almost surely, 2^2656610664 is an apocalyptic number.

2656610664 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

2656610664 is an abundant number, since it is smaller than the sum of its proper divisors (3988797336).

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

2656610664 is a wasteful number, since it uses less digits than its factorization.

2656610664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64697 (or 64693 counting only the distinct ones).

The product of its (nonzero) digits is 311040, while the sum is 42.

The square root of 2656610664 is about 51542.3191562041. The cubic root of 2656610664 is about 1384.9772423027.

The spelling of 2656610664 in words is "two billion, six hundred fifty-six million, six hundred ten thousand, six hundred sixty-four".