66719170679 has 16 divisors (see below), whose sum is σ = 76618080000. Its totient is φ = 56912544000.

The previous prime is 66719170631. The next prime is 66719170691. The reversal of 66719170679 is 97607191766.

66719170679 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 66719170679 - 2¹² = 66719166583 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66719170879) 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, 2179292 + ... + 2209694.

It is an arithmetic number, because the mean of its divisors is an integer number (4788630000).

Almost surely, 2^66719170679 is an apocalyptic number.

66719170679 is a deficient number, since it is larger than the sum of its proper divisors (9898909321).

66719170679 is a wasteful number, since it uses less digits than its factorization.

66719170679 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31910.

The product of its (nonzero) digits is 6001128, while the sum is 59.

The spelling of 66719170679 in words is "sixty-six billion, seven hundred nineteen million, one hundred seventy thousand, six hundred seventy-nine".