656676653 has 4 divisors (see below), whose sum is σ = 657551808. Its totient is φ = 655801500.

The previous prime is 656676617. The next prime is 656676659. The reversal of 656676653 is 356676656.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 656676653 - 2²² = 652482349 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (656676659) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 436451 + ... + 437952.

It is an arithmetic number, because the mean of its divisors is an integer number (164387952).

Almost surely, 2^656676653 is an apocalyptic number.

It is an amenable number.

656676653 is a deficient number, since it is larger than the sum of its proper divisors (875155).

656676653 is an equidigital number, since it uses as much as digits as its factorization.

656676653 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 875154.

The product of its digits is 4082400, while the sum is 50.

The square root of 656676653 is about 25625.7029757234. The cubic root of 656676653 is about 869.1949451473.

The spelling of 656676653 in words is "six hundred fifty-six million, six hundred seventy-six thousand, six hundred fifty-three".