2656620 has 36 divisors (see below), whose sum is σ = 8058960. Its totient is φ = 708384.

The previous prime is 2656601. The next prime is 2656627. The reversal of 2656620 is 266562.

2656620 is a `hidden beast` number, since 2 + 656 + 6 + 2 + 0 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is not an unprimeable number, because it can be changed into a prime (2656627) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 7200 + ... + 7559.

It is an arithmetic number, because the mean of its divisors is an integer number (223860).

2^2656620 is an apocalyptic number.

2656620 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2656620 is an abundant number, since it is smaller than the sum of its proper divisors (5402340).

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

2656620 is a wasteful number, since it uses less digits than its factorization.

2656620 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14774 (or 14769 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 27.

The square root of 2656620 is about 1629.9141081664. The cubic root of 2656620 is about 138.4978864687.

The spelling of 2656620 in words is "two million, six hundred fifty-six thousand, six hundred twenty".