65312772 has 48 divisors (see below), whose sum is σ = 174582912. Its totient is φ = 18616320.

The previous prime is 65312717. The next prime is 65312773. The reversal of 65312772 is 27721356.

It is not an unprimeable number, because it can be changed into a prime (65312773) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 53238 + ... + 54450.

It is an arithmetic number, because the mean of its divisors is an integer number (3637144).

Almost surely, 2^65312772 is an apocalyptic number.

It is an amenable number.

65312772 is an abundant number, since it is smaller than the sum of its proper divisors (109270140).

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

65312772 is a wasteful number, since it uses less digits than its factorization.

65312772 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1868 (or 1866 counting only the distinct ones).

The product of its digits is 17640, while the sum is 33.

The square root of 65312772 is about 8081.6317659245. The cubic root of 65312772 is about 402.7164521259.

The spelling of 65312772 in words is "sixty-five million, three hundred twelve thousand, seven hundred seventy-two".