667212160 has 32 divisors (see below), whose sum is σ = 1595055600. Its totient is φ = 266884608.

The previous prime is 667212149. The next prime is 667212181. The reversal of 667212160 is 61212766.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (32).

It is a congruent number.

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 in 3 ways as a sum of consecutive naturals, for example, 520620 + ... + 521899.

Almost surely, 2^667212160 is an apocalyptic number.

It is an amenable number.

667212160 is an abundant number, since it is smaller than the sum of its proper divisors (927843440).

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

667212160 is a wasteful number, since it uses less digits than its factorization.

667212160 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1042538 (or 1042526 counting only the distinct ones).

The product of its (nonzero) digits is 6048, while the sum is 31.

The square root of 667212160 is about 25830.4502477212. The cubic root of 667212160 is about 873.8186659393.

The spelling of 667212160 in words is "six hundred sixty-seven million, two hundred twelve thousand, one hundred sixty".