665600472 has 24 divisors (see below), whose sum is σ = 1802668140. Its totient is φ = 221866800.

The previous prime is 665600461. The next prime is 665600477. The reversal of 665600472 is 274006566.

665600472 is a `hidden beast` number, since 6 + 6 + 5 + 600 + 47 + 2 = 666.

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 congruent number.

It is not an unprimeable number, because it can be changed into a prime (665600477) 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, 4622154 + ... + 4622297.

Almost surely, 2^665600472 is an apocalyptic number.

It is an amenable number.

665600472 is an abundant number, since it is smaller than the sum of its proper divisors (1137067668).

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

665600472 is a wasteful number, since it uses less digits than its factorization.

665600472 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9244463 (or 9244456 counting only the distinct ones).

The product of its (nonzero) digits is 60480, while the sum is 36.

The square root of 665600472 is about 25799.2339421154. The cubic root of 665600472 is about 873.1145128340.

The spelling of 665600472 in words is "six hundred sixty-five million, six hundred thousand, four hundred seventy-two".