2660620656 has 40 divisors (see below), whose sum is σ = 6902058240. Its totient is φ = 883158976.

The previous prime is 2660620643. The next prime is 2660620691. The reversal of 2660620656 is 6560260662.

It is a hoax number, since the sum of its digits (39) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 104490 + ... + 127433.

It is an arithmetic number, because the mean of its divisors is an integer number (172551456).

Almost surely, 2^2660620656 is an apocalyptic number.

It is an amenable number.

2660620656 is an abundant number, since it is smaller than the sum of its proper divisors (4241437584).

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

2660620656 is a wasteful number, since it uses less digits than its factorization.

2660620656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 232173 (or 232167 counting only the distinct ones).

The product of its (nonzero) digits is 155520, while the sum is 39.

The square root of 2660620656 is about 51581.2044838040. The cubic root of 2660620656 is about 1385.6737382464.

The spelling of 2660620656 in words is "two billion, six hundred sixty million, six hundred twenty thousand, six hundred fifty-six".