667385970 has 16 divisors (see below), whose sum is σ = 1601726400. Its totient is φ = 177969584.

The previous prime is 667385969. The next prime is 667385989. The reversal of 667385970 is 79583766.

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, 11123070 + ... + 11123129.

It is an arithmetic number, because the mean of its divisors is an integer number (100107900).

Almost surely, 2^667385970 is an apocalyptic number.

667385970 is an abundant number, since it is smaller than the sum of its proper divisors (934340430).

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

667385970 is a wasteful number, since it uses less digits than its factorization.

667385970 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22246209.

The product of its (nonzero) digits is 1905120, while the sum is 51.

The square root of 667385970 is about 25833.8144686378. The cubic root of 667385970 is about 873.8945364771.

The spelling of 667385970 in words is "six hundred sixty-seven million, three hundred eighty-five thousand, nine hundred seventy".