66885700501279 has 4 divisors (see below), whose sum is σ = 72966218728680. Its totient is φ = 60805182273880.

The previous prime is 66885700501261. The next prime is 66885700501283. The reversal of 66885700501279 is 97210500758866.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 66885700501279 - 2⁵ = 66885700501247 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 66885700501279.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66885700501079) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3040259113684 + ... + 3040259113705.

It is an arithmetic number, because the mean of its divisors is an integer number (18241554682170).

Almost surely, 2^{66885700501279} is an apocalyptic number.

66885700501279 is a deficient number, since it is larger than the sum of its proper divisors (6080518227401).

66885700501279 is a wasteful number, since it uses less digits than its factorization.

66885700501279 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6080518227400.

The product of its (nonzero) digits is 50803200, while the sum is 64.

The spelling of 66885700501279 in words is "sixty-six trillion, eight hundred eighty-five billion, seven hundred million, five hundred one thousand, two hundred seventy-nine".