667320072 has 32 divisors (see below), whose sum is σ = 1675663200. Its totient is φ = 221458304.

The previous prime is 667320047. The next prime is 667320107. The reversal of 667320072 is 270023766.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 55797 + ... + 66692.

It is an arithmetic number, because the mean of its divisors is an integer number (52364475).

Almost surely, 2^667320072 is an apocalyptic number.

It is an amenable number.

667320072 is an abundant number, since it is smaller than the sum of its proper divisors (1008343128).

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

667320072 is a wasteful number, since it uses less digits than its factorization.

667320072 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 122725 (or 122721 counting only the distinct ones).

The product of its (nonzero) digits is 21168, while the sum is 33.

The square root of 667320072 is about 25832.5390157452. The cubic root of 667320072 is about 873.8657726131.

The spelling of 667320072 in words is "six hundred sixty-seven million, three hundred twenty thousand, seventy-two".