667130561572 has 6 divisors (see below), whose sum is σ = 1167478482758. Its totient is φ = 333565280784.

The previous prime is 667130561557. The next prime is 667130561609. The reversal of 667130561572 is 275165031766.

It can be written as a sum of positive squares in only one way, i.e., 433393122276 + 233737439296 = 658326^2 + 483464^2 .

It is a super-2 number, since 2×667130561572² (a number of 24 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 83391320193 + ... + 83391320200.

Almost surely, 2^667130561572 is an apocalyptic number.

It is an amenable number.

667130561572 is a deficient number, since it is larger than the sum of its proper divisors (500347921186).

667130561572 is a wasteful number, since it uses less digits than its factorization.

667130561572 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 166782640397 (or 166782640395 counting only the distinct ones).

The product of its (nonzero) digits is 1587600, while the sum is 49.

The spelling of 667130561572 in words is "six hundred sixty-seven billion, one hundred thirty million, five hundred sixty-one thousand, five hundred seventy-two".