656620272 has 120 divisors (see below), whose sum is σ = 2291103360. Its totient is φ = 170547840.

The previous prime is 656620253. The next prime is 656620303. The reversal of 656620272 is 272026656.

656620272 is a `hidden beast` number, since 6 + 5 + 6 + 620 + 27 + 2 = 666.

656620272 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 (36).

It is a congruent number.

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, 18522 + ... + 40697.

It is an arithmetic number, because the mean of its divisors is an integer number (19092528).

Almost surely, 2^656620272 is an apocalyptic number.

It is an amenable number.

656620272 is an abundant number, since it is smaller than the sum of its proper divisors (1634483088).

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

656620272 is a wasteful number, since it uses less digits than its factorization.

656620272 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 59251 (or 59242 counting only the distinct ones).

The product of its (nonzero) digits is 60480, while the sum is 36.

The square root of 656620272 is about 25624.6028652153. The cubic root of 656620272 is about 869.1700686308.

The spelling of 656620272 in words is "six hundred fifty-six million, six hundred twenty thousand, two hundred seventy-two".