66822928 has 40 divisors (see below), whose sum is σ = 133652160. Its totient is φ = 32350080.

The previous prime is 66822911. The next prime is 66822941. The reversal of 66822928 is 82922866.

It is a happy number.

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, 66526 + ... + 67522.

It is an arithmetic number, because the mean of its divisors is an integer number (3341304).

Almost surely, 2^66822928 is an apocalyptic number.

It is an amenable number.

66822928 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

66822928 is a wasteful number, since it uses less digits than its factorization.

66822928 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1135 (or 1129 counting only the distinct ones).

The product of its digits is 165888, while the sum is 43.

The square root of 66822928 is about 8174.5292219185. The cubic root of 66822928 is about 405.7966901698.

It can be divided in two parts, 66822 and 928, that multiplied together give a triangular number (62010816 = T₁₁₁₃₆).

The spelling of 66822928 in words is "sixty-six million, eight hundred twenty-two thousand, nine hundred twenty-eight".