66979675147 has 96 divisors (see below), whose sum is σ = 93089170944. Its totient is φ = 46652390400.

The previous prime is 66979675099. The next prime is 66979675151. The reversal of 66979675147 is 74157697966.

66979675147 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 66979675147 - 2²³ = 66971286539 is a prime.

It is not an unprimeable number, because it can be changed into a prime (66979675177) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 136414572 + ... + 136415062.

It is an arithmetic number, because the mean of its divisors is an integer number (969678864).

Almost surely, 2^66979675147 is an apocalyptic number.

66979675147 is a deficient number, since it is larger than the sum of its proper divisors (26109495797).

66979675147 is a wasteful number, since it uses less digits than its factorization.

66979675147 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 769 (or 746 counting only the distinct ones).

The product of its digits is 120022560, while the sum is 67.

The spelling of 66979675147 in words is "sixty-six billion, nine hundred seventy-nine million, six hundred seventy-five thousand, one hundred forty-seven".