65657420 has 24 divisors (see below), whose sum is σ = 138166224. Its totient is φ = 26208576.

The previous prime is 65657419. The next prime is 65657467. The reversal of 65657420 is 2475656.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7322 + ... + 13598.

It is an arithmetic number, because the mean of its divisors is an integer number (5756926).

Almost surely, 2^65657420 is an apocalyptic number.

It is an amenable number.

65657420 is an abundant number, since it is smaller than the sum of its proper divisors (72508804).

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

65657420 is a wasteful number, since it uses less digits than its factorization.

65657420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6809 (or 6807 counting only the distinct ones).

The product of its (nonzero) digits is 50400, while the sum is 35.

The square root of 65657420 is about 8102.9266317794. The cubic root of 65657420 is about 403.4235726115.

The spelling of 65657420 in words is "sixty-five million, six hundred fifty-seven thousand, four hundred twenty".