66814212 has 24 divisors (see below), whose sum is σ = 156052512. Its totient is φ = 22249600.

The previous prime is 66814201. The next prime is 66814229. The reversal of 66814212 is 21241866.

It is a hoax number, since the sum of its digits (30) coincides with the sum of the digits of its distinct prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 66814212.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14287 + ... + 18377.

It is an arithmetic number, because the mean of its divisors is an integer number (6502188).

Almost surely, 2^66814212 is an apocalyptic number.

It is an amenable number.

66814212 is an abundant number, since it is smaller than the sum of its proper divisors (89238300).

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

66814212 is a wasteful number, since it uses less digits than its factorization.

66814212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5459 (or 5457 counting only the distinct ones).

The product of its digits is 4608, while the sum is 30.

The square root of 66814212 is about 8173.9960851471. The cubic root of 66814212 is about 405.7790461373.

The spelling of 66814212 in words is "sixty-six million, eight hundred fourteen thousand, two hundred twelve".