66470472 has 24 divisors (see below), whose sum is σ = 180024390. Its totient is φ = 22156800.

The previous prime is 66470429. The next prime is 66470477. The reversal of 66470472 is 27407466.

66470472 is a `hidden beast` number, since 6 + 647 + 0 + 4 + 7 + 2 = 666.

It can be written as a sum of positive squares in only one way, i.e., 46703556 + 19766916 = 6834^2 + 4446^2 .

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 not an unprimeable number, because it can be changed into a prime (66470477) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 461529 + ... + 461672.

Almost surely, 2^66470472 is an apocalyptic number.

It is an amenable number.

66470472 is an abundant number, since it is smaller than the sum of its proper divisors (113553918).

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

66470472 is a wasteful number, since it uses less digits than its factorization.

66470472 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 923213 (or 923206 counting only the distinct ones).

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

The square root of 66470472 is about 8152.9425362871. The cubic root of 66470472 is about 405.0819770043.

The spelling of 66470472 in words is "sixty-six million, four hundred seventy thousand, four hundred seventy-two".