66202779879 has 6 divisors (see below), whose sum is σ = 95626237616. Its totient is φ = 44135186580.

The previous prime is 66202779869. The next prime is 66202779889. The reversal of 66202779879 is 97897720266.

It is an interprime number because it is at equal distance from previous prime (66202779869) and next prime (66202779889).

It is not a de Polignac number, because 66202779879 - 2⁸ = 66202779623 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66202779869) 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, 3677932207 + ... + 3677932224.

Almost surely, 2^66202779879 is an apocalyptic number.

66202779879 is a deficient number, since it is larger than the sum of its proper divisors (29423457737).

66202779879 is a wasteful number, since it uses less digits than its factorization.

66202779879 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7355864437 (or 7355864434 counting only the distinct ones).

The product of its (nonzero) digits is 32006016, while the sum is 63.

The spelling of 66202779879 in words is "sixty-six billion, two hundred two million, seven hundred seventy-nine thousand, eight hundred seventy-nine".