656868653 has 8 divisors (see below), whose sum is σ = 763431360. Its totient is φ = 553487040.

The previous prime is 656868631. The next prime is 656868671. The reversal of 656868653 is 356868656.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 656868653 - 2¹² = 656864557 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 656868595 and 656868604.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (656868623) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 794828 + ... + 795653.

It is an arithmetic number, because the mean of its divisors is an integer number (95428920).

Almost surely, 2^656868653 is an apocalyptic number.

It is an amenable number.

656868653 is a deficient number, since it is larger than the sum of its proper divisors (106562707).

656868653 is a wasteful number, since it uses less digits than its factorization.

656868653 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1590547.

The product of its digits is 6220800, while the sum is 53.

The square root of 656868653 is about 25629.4489406230. The cubic root of 656868653 is about 869.2796490203.

The spelling of 656868653 in words is "six hundred fifty-six million, eight hundred sixty-eight thousand, six hundred fifty-three".