66772404 has 48 divisors (see below), whose sum is σ = 180647040. Its totient is φ = 21288960.

The previous prime is 66772397. The next prime is 66772429. The reversal of 66772404 is 40427766.

It is a super-4 number, since 4×66772404⁴ (a number of 32 digits) contains 4444 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

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, 10957 + ... + 15924.

It is an arithmetic number, because the mean of its divisors is an integer number (3763480).

Almost surely, 2^66772404 is an apocalyptic number.

It is an amenable number.

66772404 is an abundant number, since it is smaller than the sum of its proper divisors (113874636).

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

66772404 is a wasteful number, since it uses less digits than its factorization.

66772404 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26917 (or 26909 counting only the distinct ones).

The product of its (nonzero) digits is 56448, while the sum is 36.

The square root of 66772404 is about 8171.4383066875. The cubic root of 66772404 is about 405.6943917423.

It can be divided in two parts, 66772 and 404, that added together give a palindrome (67176).

The spelling of 66772404 in words is "sixty-six million, seven hundred seventy-two thousand, four hundred four".