666152604 has 36 divisors (see below), whose sum is σ = 1813416696. Its totient is φ = 204969888.

The previous prime is 666152587. The next prime is 666152621. The reversal of 666152604 is 406251666.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (666152587) and next prime (666152621).

It is a tau number, because it is divible by the number of its divisors (36).

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 11 ways as a sum of consecutive naturals, for example, 711234 + ... + 712169.

It is an arithmetic number, because the mean of its divisors is an integer number (50372686).

Almost surely, 2^666152604 is an apocalyptic number.

It is an amenable number.

666152604 is an abundant number, since it is smaller than the sum of its proper divisors (1147264092).

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

666152604 is a wasteful number, since it uses less digits than its factorization.

666152604 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1423426 (or 1423421 counting only the distinct ones).

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

The square root of 666152604 is about 25809.9322742234. The cubic root of 666152604 is about 873.3558694468.

The spelling of 666152604 in words is "six hundred sixty-six million, one hundred fifty-two thousand, six hundred four".