66872328 has 16 divisors (see below), whose sum is σ = 167180880. Its totient is φ = 22290768.

The previous prime is 66872321. The next prime is 66872329. The reversal of 66872328 is 82327866.

It is a hoax number, since the sum of its digits (42) 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 66872328.

It is not an unprimeable number, because it can be changed into a prime (66872321) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1393150 + ... + 1393197.

It is an arithmetic number, because the mean of its divisors is an integer number (10448805).

Almost surely, 2^66872328 is an apocalyptic number.

It is an amenable number.

66872328 is an abundant number, since it is smaller than the sum of its proper divisors (100308552).

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

66872328 is a wasteful number, since it uses less digits than its factorization.

66872328 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2786356 (or 2786352 counting only the distinct ones).

The product of its digits is 193536, while the sum is 42.

The square root of 66872328 is about 8177.5502444192. The cubic root of 66872328 is about 405.8966629349.

The spelling of 66872328 in words is "sixty-six million, eight hundred seventy-two thousand, three hundred twenty-eight".