66664259579 has 6 divisors (see below), whose sum is σ = 70357570740. Its totient is φ = 63155613996.

The previous prime is 66664259537. The next prime is 66664259603. The reversal of 66664259579 is 97595246666.

It is a de Polignac number, because none of the positive numbers 2^k-66664259579 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66664256579) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 92332409 + ... + 92333130.

It is an arithmetic number, because the mean of its divisors is an integer number (11726261790).

Almost surely, 2^66664259579 is an apocalyptic number.

66664259579 is a deficient number, since it is larger than the sum of its proper divisors (3693311161).

66664259579 is a wasteful number, since it uses less digits than its factorization.

66664259579 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 184665577 (or 184665558 counting only the distinct ones).

The product of its digits is 146966400, while the sum is 65.

The spelling of 66664259579 in words is "sixty-six billion, six hundred sixty-four million, two hundred fifty-nine thousand, five hundred seventy-nine".