666730670 has 32 divisors (see below), whose sum is σ = 1255590720. Its totient is φ = 254425600.

The previous prime is 666730663. The next prime is 666730679. The reversal of 666730670 is 76037666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (666730679) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 88616 + ... + 95844.

It is an arithmetic number, because the mean of its divisors is an integer number (39237210).

Almost surely, 2^666730670 is an apocalyptic number.

666730670 is a deficient number, since it is larger than the sum of its proper divisors (588860050).

666730670 is a wasteful number, since it uses less digits than its factorization.

666730670 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7660.

The product of its (nonzero) digits is 190512, while the sum is 41.

The square root of 666730670 is about 25821.1283641904. The cubic root of 666730670 is about 873.6084198725.

The spelling of 666730670 in words is "six hundred sixty-six million, seven hundred thirty thousand, six hundred seventy".