65618972 has 12 divisors (see below), whose sum is σ = 115049256. Its totient is φ = 32747760.

The previous prime is 65618957. The next prime is 65619011. The reversal of 65618972 is 27981656.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12998 + ... + 17325.

It is an arithmetic number, because the mean of its divisors is an integer number (9587438).

Almost surely, 2^65618972 is an apocalyptic number.

It is an amenable number.

65618972 is a deficient number, since it is larger than the sum of its proper divisors (49430284).

65618972 is a wasteful number, since it uses less digits than its factorization.

65618972 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30868 (or 30866 counting only the distinct ones).

The product of its digits is 181440, while the sum is 44.

The square root of 65618972 is about 8100.5538082282. The cubic root of 65618972 is about 403.3448109719.

The spelling of 65618972 in words is "sixty-five million, six hundred eighteen thousand, nine hundred seventy-two".