66424392 has 24 divisors (see below), whose sum is σ = 179899590. Its totient is φ = 22141440.

The previous prime is 66424381. The next prime is 66424411. The reversal of 66424392 is 29342466.

66424392 is a `hidden beast` number, since 6 + 642 + 4 + 3 + 9 + 2 = 666.

It can be written as a sum of positive squares in only one way, i.e., 35354916 + 31069476 = 5946^2 + 5574^2 .

It is a tau number, because it is divible by the number of its divisors (24).

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

It is a nude number because it is divisible by every one of its digits.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 461209 + ... + 461352.

Almost surely, 2^66424392 is an apocalyptic number.

It is an amenable number.

66424392 is an abundant number, since it is smaller than the sum of its proper divisors (113475198).

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

66424392 is a wasteful number, since it uses less digits than its factorization.

66424392 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 922573 (or 922566 counting only the distinct ones).

The product of its digits is 62208, while the sum is 36.

The square root of 66424392 is about 8150.1160727931. The cubic root of 66424392 is about 404.9883490018.

The spelling of 66424392 in words is "sixty-six million, four hundred twenty-four thousand, three hundred ninety-two".