660886076601 has 27 divisors (see below), whose sum is σ = 964517910447. Its totient is φ = 436065843600.

The previous prime is 660886076569. The next prime is 660886076647. The reversal of 660886076601 is 106670688066.

The square root of 660886076601 is 812949.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 634971516201 + 25914560400 = 796851^2 + 160980^2 .

It is not a de Polignac number, because 660886076601 - 2⁵ = 660886076569 is a prime.

It is not an unprimeable number, because it can be changed into a prime (660886076801) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 246322206 + ... + 246324888.

Almost surely, 2^660886076601 is an apocalyptic number.

660886076601 is the 812949-th square number.

660886076601 is the 406475-th centered octagonal number.

It is an amenable number.

660886076601 is a deficient number, since it is larger than the sum of its proper divisors (303631833846).

660886076601 is an frugal number, since it uses more digits than its factorization.

660886076601 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5574 (or 2787 counting only the distinct ones).

The product of its (nonzero) digits is 3483648, while the sum is 54.

The spelling of 660886076601 in words is "six hundred sixty billion, eight hundred eighty-six million, seventy-six thousand, six hundred one".