667996012 has 6 divisors (see below), whose sum is σ = 1168993028. Its totient is φ = 333998004.

The previous prime is 667996001. The next prime is 667996019. The reversal of 667996012 is 210699766.

It is a super-4 number, since 4×667996012⁴ (a number of 36 digits) contains 4444 as substring.

It is not an unprimeable number, because it can be changed into a prime (667996019) by changing a digit.

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 as a sum of consecutive naturals, namely, 83499498 + ... + 83499505.

Almost surely, 2^667996012 is an apocalyptic number.

It is an amenable number.

667996012 is a deficient number, since it is larger than the sum of its proper divisors (500997016).

667996012 is a wasteful number, since it uses less digits than its factorization.

667996012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 166999007 (or 166999005 counting only the distinct ones).

The product of its (nonzero) digits is 244944, while the sum is 46.

The square root of 667996012 is about 25845.6188163487. The cubic root of 667996012 is about 874.1607242814.

The spelling of 667996012 in words is "six hundred sixty-seven million, nine hundred ninety-six thousand, twelve".