666137152 has 14 divisors (see below), whose sum is σ = 1321866038. Its totient is φ = 333068544.

The previous prime is 666137119. The next prime is 666137161. The reversal of 666137152 is 251731666.

It can be written as a sum of positive squares in only one way, i.e., 531948096 + 134189056 = 23064^2 + 11584^2 .

It is a super-2 number, since 2×666137152² = 887477410549342208, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5204133 + ... + 5204260.

Almost surely, 2^666137152 is an apocalyptic number.

It is an amenable number.

666137152 is a deficient number, since it is larger than the sum of its proper divisors (655728886).

666137152 is a wasteful number, since it uses less digits than its factorization.

666137152 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10408405 (or 10408395 counting only the distinct ones).

The product of its digits is 45360, while the sum is 37.

The square root of 666137152 is about 25809.6329303615. The cubic root of 666137152 is about 873.3491166401.

The spelling of 666137152 in words is "six hundred sixty-six million, one hundred thirty-seven thousand, one hundred fifty-two".