65988412 has 24 divisors (see below), whose sum is σ = 132187104. Its totient is φ = 28235712.

The previous prime is 65988401. The next prime is 65988457. The reversal of 65988412 is 21488956.

It is a happy number.

It is a congruent number.

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, 20838 + ... + 23794.

It is an arithmetic number, because the mean of its divisors is an integer number (5507796).

Almost surely, 2^65988412 is an apocalyptic number.

It is an amenable number.

65988412 is an abundant number, since it is smaller than the sum of its proper divisors (66198692).

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

65988412 is a wasteful number, since it uses less digits than its factorization.

65988412 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3765 (or 3763 counting only the distinct ones).

The product of its digits is 138240, while the sum is 43.

The square root of 65988412 is about 8123.3251812297. The cubic root of 65988412 is about 404.1003492186.

It can be divided in two parts, 65 and 988412, that multiplied together give a triangular number (64246780 = T₁₁₃₃₅).

The spelling of 65988412 in words is "sixty-five million, nine hundred eighty-eight thousand, four hundred twelve".