66957922975966 has 32 divisors (see below), whose sum is σ = 109799223791616. Its totient is φ = 30371064360000.

The previous prime is 66957922975943. The next prime is 66957922975981.

66957922975966 is nontrivially palindromic in base 10.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 142167666 + ... + 142637866.

It is an arithmetic number, because the mean of its divisors is an integer number (3431225743488).

Almost surely, 2^{66957922975966} is an apocalyptic number.

66957922975966 is a deficient number, since it is larger than the sum of its proper divisors (42841300815650).

66957922975966 is a wasteful number, since it uses less digits than its factorization.

66957922975966 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 483888.

The product of its digits is 41664974400, while the sum is 88.

The spelling of 66957922975966 in words is "sixty-six trillion, nine hundred fifty-seven billion, nine hundred twenty-two million, nine hundred seventy-five thousand, nine hundred sixty-six".