65865772 has 24 divisors (see below), whose sum is σ = 135293984. Its totient is φ = 27464832.

The previous prime is 65865713. The next prime is 65865773. The reversal of 65865772 is 27756856.

It is not an unprimeable number, because it can be changed into a prime (65865773) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 30753 + ... + 32824.

Almost surely, 2^65865772 is an apocalyptic number.

It is an amenable number.

65865772 is an abundant number, since it is smaller than the sum of its proper divisors (69428212).

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

65865772 is a wasteful number, since it uses less digits than its factorization.

65865772 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63625 (or 63623 counting only the distinct ones).

The product of its digits is 705600, while the sum is 46.

The square root of 65865772 is about 8115.7730377334. The cubic root of 65865772 is about 403.8498527101.

It can be divided in two parts, 658 and 65772, that added together give a triangular number (66430 = T₃₆₄).

The spelling of 65865772 in words is "sixty-five million, eight hundred sixty-five thousand, seven hundred seventy-two".