667234660 has 12 divisors (see below), whose sum is σ = 1401192828. Its totient is φ = 266893856.

The previous prime is 667234643. The next prime is 667234663. The reversal of 667234660 is 66432766.

It can be written as a sum of positive squares in 2 ways, for example, as 160174336 + 507060324 = 12656^2 + 22518^2 .

It is not an unprimeable number, because it can be changed into a prime (667234663) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16680847 + ... + 16680886.

It is an arithmetic number, because the mean of its divisors is an integer number (116766069).

Almost surely, 2^667234660 is an apocalyptic number.

It is an amenable number.

667234660 is an abundant number, since it is smaller than the sum of its proper divisors (733958168).

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

667234660 is a wasteful number, since it uses less digits than its factorization.

667234660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33361742 (or 33361740 counting only the distinct ones).

The product of its (nonzero) digits is 217728, while the sum is 40.

The square root of 667234660 is about 25830.8857765273. The cubic root of 667234660 is about 873.8284882518.

The spelling of 667234660 in words is "six hundred sixty-seven million, two hundred thirty-four thousand, six hundred sixty".