656642416 has 10 divisors (see below), whose sum is σ = 1272244712. Its totient is φ = 328321200.

The previous prime is 656642381. The next prime is 656642417. The reversal of 656642416 is 614246656.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (656642417) 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 as a sum of consecutive naturals, namely, 20520060 + ... + 20520091.

Almost surely, 2^656642416 is an apocalyptic number.

It is an amenable number.

656642416 is a deficient number, since it is larger than the sum of its proper divisors (615602296).

656642416 is a wasteful number, since it uses less digits than its factorization.

656642416 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41040159 (or 41040153 counting only the distinct ones).

The product of its digits is 207360, while the sum is 40.

The square root of 656642416 is about 25625.0349463176. The cubic root of 656642416 is about 869.1798392123.

The spelling of 656642416 in words is "six hundred fifty-six million, six hundred forty-two thousand, four hundred sixteen".