666167312 has 10 divisors (see below), whose sum is σ = 1290699198. Its totient is φ = 333083648.

The previous prime is 666167311. The next prime is 666167347. The reversal of 666167312 is 213761666.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 650454016 + 15713296 = 25504^2 + 3964^2 .

It is not an unprimeable number, because it can be changed into a prime (666167311) by changing a digit.

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, 20817713 + ... + 20817744.

Almost surely, 2^666167312 is an apocalyptic number.

It is an amenable number.

666167312 is a deficient number, since it is larger than the sum of its proper divisors (624531886).

666167312 is a wasteful number, since it uses less digits than its factorization.

666167312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41635465 (or 41635459 counting only the distinct ones).

The product of its digits is 54432, while the sum is 38.

The square root of 666167312 is about 25810.2172017207. The cubic root of 666167312 is about 873.3622970148.

The spelling of 666167312 in words is "six hundred sixty-six million, one hundred sixty-seven thousand, three hundred twelve".