65657668 has 6 divisors (see below), whose sum is σ = 114900926. Its totient is φ = 32828832.

The previous prime is 65657639. The next prime is 65657671. The reversal of 65657668 is 86675656.

It can be written as a sum of positive squares in only one way, i.e., 64770304 + 887364 = 8048^2 + 942^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8207205 + ... + 8207212.

Almost surely, 2^65657668 is an apocalyptic number.

It is an amenable number.

65657668 is a deficient number, since it is larger than the sum of its proper divisors (49243258).

65657668 is a wasteful number, since it uses less digits than its factorization.

65657668 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16414421 (or 16414419 counting only the distinct ones).

The product of its digits is 1814400, while the sum is 49.

The square root of 65657668 is about 8102.9419348777. The cubic root of 65657668 is about 403.4240805455.

The spelling of 65657668 in words is "sixty-five million, six hundred fifty-seven thousand, six hundred sixty-eight".