65597972 has 18 divisors (see below), whose sum is σ = 126182154. Its totient is φ = 29817040.

The previous prime is 65597963. The next prime is 65597993. The reversal of 65597972 is 27979556.

65597972 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 63425296 + 2172676 = 7964^2 + 1474^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 65597972.

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 in 5 ways as a sum of consecutive naturals, for example, 67283 + ... + 68250.

Almost surely, 2^65597972 is an apocalyptic number.

It is an amenable number.

65597972 is a deficient number, since it is larger than the sum of its proper divisors (60584182).

65597972 is a wasteful number, since it uses less digits than its factorization.

65597972 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 135559 (or 135546 counting only the distinct ones).

The product of its digits is 1190700, while the sum is 50.

The square root of 65597972 is about 8099.2574968327. The cubic root of 65597972 is about 403.3017789823.

The spelling of 65597972 in words is "sixty-five million, five hundred ninety-seven thousand, nine hundred seventy-two".