66245568279 has 16 divisors (see below), whose sum is σ = 96665055744. Its totient is φ = 40020552000.

The previous prime is 66245568269. The next prime is 66245568331. The reversal of 66245568279 is 97286554266.

It is a happy number.

It is not a de Polignac number, because 66245568279 - 2²⁰ = 66244519703 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66245568239) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3196447 + ... + 3217104.

It is an arithmetic number, because the mean of its divisors is an integer number (6041565984).

Almost surely, 2^66245568279 is an apocalyptic number.

66245568279 is a deficient number, since it is larger than the sum of its proper divisors (30419487465).

66245568279 is a wasteful number, since it uses less digits than its factorization.

66245568279 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6413878.

The product of its digits is 43545600, while the sum is 60.

The spelling of 66245568279 in words is "sixty-six billion, two hundred forty-five million, five hundred sixty-eight thousand, two hundred seventy-nine".