666506152 has 16 divisors (see below), whose sum is σ = 1345829940. Its totient is φ = 307618176.

The previous prime is 666506041. The next prime is 666506189. The reversal of 666506152 is 251605666.

666506152 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 665949636 + 556516 = 25806^2 + 746^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3204253 + ... + 3204460.

Almost surely, 2^666506152 is an apocalyptic number.

It is an amenable number.

666506152 is an abundant number, since it is smaller than the sum of its proper divisors (679323788).

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

666506152 is a wasteful number, since it uses less digits than its factorization.

666506152 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6408732 (or 6408728 counting only the distinct ones).

The product of its (nonzero) digits is 64800, while the sum is 37.

The square root of 666506152 is about 25816.7804344384. The cubic root of 666506152 is about 873.5103478701.

The spelling of 666506152 in words is "six hundred sixty-six million, five hundred six thousand, one hundred fifty-two".