666413502 has 32 divisors (see below), whose sum is σ = 1349088000. Its totient is φ = 219438720.

The previous prime is 666413497. The next prime is 666413519. The reversal of 666413502 is 205314666.

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, 307302 + ... + 309462.

It is an arithmetic number, because the mean of its divisors is an integer number (42159000).

Almost surely, 2^666413502 is an apocalyptic number.

666413502 is an abundant number, since it is smaller than the sum of its proper divisors (682674498).

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

666413502 is a wasteful number, since it uses less digits than its factorization.

666413502 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2768.

The product of its (nonzero) digits is 25920, while the sum is 33.

The square root of 666413502 is about 25814.9859965099. The cubic root of 666413502 is about 873.4698708823.

The spelling of 666413502 in words is "six hundred sixty-six million, four hundred thirteen thousand, five hundred two".