2656643670 has 56 divisors (see below), whose sum is σ = 7169677776. Its totient is φ = 708436368.

The previous prime is 2656643659. The next prime is 2656643699. The reversal of 2656643670 is 763466562.

2656643670 is a `hidden beast` number, since 26 + 566 + 4 + 3 + 67 + 0 = 666.

2656643670 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 27 ways as a sum of consecutive naturals, for example, 174922 + ... + 189501.

Almost surely, 2^2656643670 is an apocalyptic number.

2656643670 is an abundant number, since it is smaller than the sum of its proper divisors (4513034106).

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

2656643670 is an equidigital number, since it uses as much as digits as its factorization.

2656643670 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 364448 (or 364433 counting only the distinct ones).

The product of its (nonzero) digits is 1088640, while the sum is 45.

The square root of 2656643670 is about 51542.6393387067. The cubic root of 2656643670 is about 1384.9829779781.

The spelling of 2656643670 in words is "two billion, six hundred fifty-six million, six hundred forty-three thousand, six hundred seventy".