667130020 has 24 divisors (see below), whose sum is σ = 1414070784. Its totient is φ = 264357216.

The previous prime is 667130003. The next prime is 667130053. The reversal of 667130020 is 20031766.

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, 153732 + ... + 158011.

It is an arithmetic number, because the mean of its divisors is an integer number (58919616).

Almost surely, 2^667130020 is an apocalyptic number.

It is an amenable number.

667130020 is an abundant number, since it is smaller than the sum of its proper divisors (746940764).

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

667130020 is a wasteful number, since it uses less digits than its factorization.

667130020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 311859 (or 311857 counting only the distinct ones).

The product of its (nonzero) digits is 1512, while the sum is 25.

The square root of 667130020 is about 25828.8602148837. The cubic root of 667130020 is about 873.7828060759.

Adding to 667130020 its reverse (20031766), we get a palindrome (687161786).

The spelling of 667130020 in words is "six hundred sixty-seven million, one hundred thirty thousand, twenty".