666959688976 has 45 divisors (see below), whose sum is σ = 1503262981719. Its totient is φ = 285830066592.

The previous prime is 666959688971. The next prime is 666959689009. The reversal of 666959688976 is 679886959666.

The square root of 666959688976 is 816676.

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

It is a super-3 number, since 3×666959688976³ (a number of 36 digits) contains 333 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 666959688893 and 666959688902.

It is not an unprimeable number, because it can be changed into a prime (666959688971) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 22852345 + ... + 22881511.

Almost surely, 2^666959688976 is an apocalyptic number.

666959688976 is the 816676-th square number.

It is an amenable number.

666959688976 is an abundant number, since it is smaller than the sum of its proper divisors (836303292743).

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

666959688976 is an frugal number, since it uses more digits than its factorization.

666959688976 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58356 (or 29176 counting only the distinct ones).

The product of its digits is 12697896960, while the sum is 85.

The spelling of 666959688976 in words is "six hundred sixty-six billion, nine hundred fifty-nine million, six hundred eighty-eight thousand, nine hundred seventy-six".