656745080 has 16 divisors (see below), whose sum is σ = 1477676520. Its totient is φ = 262698016.

The previous prime is 656745077. The next prime is 656745083. The reversal of 656745080 is 80547656.

It is an interprime number because it is at equal distance from previous prime (656745077) and next prime (656745083).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (656745083) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8209274 + ... + 8209353.

Almost surely, 2^656745080 is an apocalyptic number.

It is an amenable number.

656745080 is an abundant number, since it is smaller than the sum of its proper divisors (820931440).

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

656745080 is a wasteful number, since it uses less digits than its factorization.

656745080 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16418638 (or 16418634 counting only the distinct ones).

The product of its (nonzero) digits is 201600, while the sum is 41.

The square root of 656745080 is about 25627.0380652935. The cubic root of 656745080 is about 869.2251347069.

The spelling of 656745080 in words is "six hundred fifty-six million, seven hundred forty-five thousand, eighty".