66195752079 has 8 divisors (see below), whose sum is σ = 90138896640. Its totient is φ = 43191554456.

The previous prime is 66195752059. The next prime is 66195752131. The reversal of 66195752079 is 97025759166.

66195752079 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 66195752079 - 2²⁷ = 66061534351 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66195752059) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 234736569 + ... + 234736850.

It is an arithmetic number, because the mean of its divisors is an integer number (11267362080).

Almost surely, 2^66195752079 is an apocalyptic number.

66195752079 is a deficient number, since it is larger than the sum of its proper divisors (23943144561).

66195752079 is a wasteful number, since it uses less digits than its factorization.

66195752079 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 469473469.

The product of its (nonzero) digits is 7144200, while the sum is 57.

The spelling of 66195752079 in words is "sixty-six billion, one hundred ninety-five million, seven hundred fifty-two thousand, seventy-nine".