66830772 has 24 divisors (see below), whose sum is σ = 159566176. Its totient is φ = 21758688.

The previous prime is 66830759. The next prime is 66830773. The reversal of 66830772 is 27703866.

66830772 is digitally balanced in base 9, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×66830772² = 8932704172231968, which contains 22 as substring.

It is a Smith number, since the sum of its digits (39) coincides with the sum of the digits of its prime factors.

66830772 is strictly pandigital in base 9.

It is a self number, because there is not a number n which added to its sum of digits gives 66830772.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66830773) 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, 64243 + ... + 65274.

Almost surely, 2^66830772 is an apocalyptic number.

It is an amenable number.

66830772 is an abundant number, since it is smaller than the sum of its proper divisors (92735404).

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

66830772 is a wasteful number, since it uses less digits than its factorization.

66830772 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 129567 (or 129565 counting only the distinct ones).

The product of its (nonzero) digits is 84672, while the sum is 39.

The square root of 66830772 is about 8175.0089908207. The cubic root of 66830772 is about 405.8125676777.

The spelling of 66830772 in words is "sixty-six million, eight hundred thirty thousand, seven hundred seventy-two".