66976692945 has 32 divisors (see below), whose sum is σ = 108061409280. Its totient is φ = 35421624000.

The previous prime is 66976692941. The next prime is 66976692971. The reversal of 66976692945 is 54929667966.

It is not a de Polignac number, because 66976692945 - 2² = 66976692941 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 66976692945.

It is not an unprimeable number, because it can be changed into a prime (66976692941) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4280346 + ... + 4295964.

It is an arithmetic number, because the mean of its divisors is an integer number (3376919040).

Almost surely, 2^66976692945 is an apocalyptic number.

It is an amenable number.

66976692945 is a deficient number, since it is larger than the sum of its proper divisors (41084716335).

66976692945 is a wasteful number, since it uses less digits than its factorization.

66976692945 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18005.

The product of its digits is 264539520, while the sum is 69.

The spelling of 66976692945 in words is "sixty-six billion, nine hundred seventy-six million, six hundred ninety-two thousand, nine hundred forty-five".