66925404 has 144 divisors (see below), whose sum is σ = 215255040. Its totient is φ = 17055360.

The previous prime is 66925367. The next prime is 66925421. The reversal of 66925404 is 40452966.

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 pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 101227 + ... + 101885.

Almost surely, 2^66925404 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 66925404, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (107627520).

66925404 is an abundant number, since it is smaller than the sum of its proper divisors (148329636).

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

66925404 is a wasteful number, since it uses less digits than its factorization.

66925404 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 720 (or 715 counting only the distinct ones).

The product of its (nonzero) digits is 51840, while the sum is 36.

The square root of 66925404 is about 8180.7948269102. The cubic root of 66925404 is about 406.0040201176.

The spelling of 66925404 in words is "sixty-six million, nine hundred twenty-five thousand, four hundred four".