66412830 has 32 divisors (see below), whose sum is σ = 173881728. Its totient is φ = 16100000.

The previous prime is 66412807. The next prime is 66412849. The reversal of 66412830 is 3821466.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a Curzon 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, 100296 + ... + 100955.

It is an arithmetic number, because the mean of its divisors is an integer number (5433804).

Almost surely, 2^66412830 is an apocalyptic number.

66412830 is an abundant number, since it is smaller than the sum of its proper divisors (107468898).

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

66412830 is a wasteful number, since it uses less digits than its factorization.

66412830 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 201272.

The product of its (nonzero) digits is 6912, while the sum is 30.

The square root of 66412830 is about 8149.4067268728. The cubic root of 66412830 is about 404.9648498682.

The spelling of 66412830 in words is "sixty-six million, four hundred twelve thousand, eight hundred thirty".