66828512 has 24 divisors (see below), whose sum is σ = 135126936. Its totient is φ = 32510592.

The previous prime is 66828497. The next prime is 66828571. The reversal of 66828512 is 21582866.

It is a super-2 number, since 2×66828512² = 8932100032268288, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 27038 + ... + 29405.

It is an arithmetic number, because the mean of its divisors is an integer number (5630289).

Almost surely, 2^66828512 is an apocalyptic number.

It is an amenable number.

66828512 is an abundant number, since it is smaller than the sum of its proper divisors (68298424).

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

66828512 is a wasteful number, since it uses less digits than its factorization.

66828512 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56490 (or 56482 counting only the distinct ones).

The product of its digits is 46080, while the sum is 38.

The square root of 66828512 is about 8174.8707635045. The cubic root of 66828512 is about 405.8079932045.

The spelling of 66828512 in words is "sixty-six million, eight hundred twenty-eight thousand, five hundred twelve".