65685972 has 48 divisors (see below), whose sum is σ = 169344000. Its totient is φ = 19649760.

The previous prime is 65685967. The next prime is 65686003. The reversal of 65685972 is 27958656.

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 15 ways as a sum of consecutive naturals, for example, 7279 + ... + 13577.

It is an arithmetic number, because the mean of its divisors is an integer number (3528000).

Almost surely, 2^65685972 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 65685972, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (84672000).

65685972 is an abundant number, since it is smaller than the sum of its proper divisors (103658028).

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

65685972 is a wasteful number, since it uses less digits than its factorization.

65685972 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6396 (or 6394 counting only the distinct ones).

The product of its digits is 907200, while the sum is 48.

The square root of 65685972 is about 8104.6882728455. The cubic root of 65685972 is about 403.4820421675.

The spelling of 65685972 in words is "sixty-five million, six hundred eighty-five thousand, nine hundred seventy-two".