656897553 has 16 divisors (see below), whose sum is σ = 1048042240. Its totient is φ = 404244432.

The previous prime is 656897539. The next prime is 656897573. The reversal of 656897553 is 355798656.

656897553 is a `hidden beast` number, since 6 + 5 + 6 + 89 + 7 + 553 = 666.

656897553 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 656897553 - 2⁶ = 656897489 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 656897553.

It is not an unprimeable number, because it can be changed into a prime (656897573) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 935401 + ... + 936102.

It is an arithmetic number, because the mean of its divisors is an integer number (65502640).

Almost surely, 2^656897553 is an apocalyptic number.

It is an amenable number.

656897553 is a deficient number, since it is larger than the sum of its proper divisors (391144687).

656897553 is a wasteful number, since it uses less digits than its factorization.

656897553 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1871525 (or 1871519 counting only the distinct ones).

The product of its digits is 6804000, while the sum is 54.

The square root of 656897553 is about 25630.0127389746. The cubic root of 656897553 is about 869.2923972886.

The spelling of 656897553 in words is "six hundred fifty-six million, eight hundred ninety-seven thousand, five hundred fifty-three".