656987416 has 8 divisors (see below), whose sum is σ = 1231851420. Its totient is φ = 328493704.

The previous prime is 656987407. The next prime is 656987437. The reversal of 656987416 is 614789656.

It is a tau number, because it is divible by the number of its divisors (8).

It is an alternating number because its digits alternate between even and odd.

It is a congruent number.

It is an unprimeable number.

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, 41061706 + ... + 41061721.

Almost surely, 2^656987416 is an apocalyptic number.

It is an amenable number.

656987416 is a deficient number, since it is larger than the sum of its proper divisors (574864004).

656987416 is a wasteful number, since it uses less digits than its factorization.

656987416 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 82123433 (or 82123429 counting only the distinct ones).

The product of its digits is 2177280, while the sum is 52.

The square root of 656987416 is about 25631.7657604778. The cubic root of 656987416 is about 869.3320349563.

The spelling of 656987416 in words is "six hundred fifty-six million, nine hundred eighty-seven thousand, four hundred sixteen".