666976063970 has 16 divisors (see below), whose sum is σ = 1217466168768. Its totient is φ = 263032813680.

The previous prime is 666976063933. The next prime is 666976063979. The reversal of 666976063970 is 79360679666.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 666976063897 and 666976063906.

It is not an unprimeable number, because it can be changed into a prime (666976063979) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 469700744 + ... + 469702163.

It is an arithmetic number, because the mean of its divisors is an integer number (76091635548).

Almost surely, 2^666976063970 is an apocalyptic number.

666976063970 is a deficient number, since it is larger than the sum of its proper divisors (550490104798).

666976063970 is a wasteful number, since it uses less digits than its factorization.

666976063970 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 939402985.

The product of its (nonzero) digits is 92588832, while the sum is 65.

The spelling of 666976063970 in words is "six hundred sixty-six billion, nine hundred seventy-six million, sixty-three thousand, nine hundred seventy".