6664271145979 has 4 divisors (see below), whose sum is σ = 6694155770176. Its totient is φ = 6634386521784.

The previous prime is 6664271145881. The next prime is 6664271145989. The reversal of 6664271145979 is 9795411724666.

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

It is a cyclic number.

It is not a de Polignac number, because 6664271145979 - 2²³ = 6664262757371 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6664271145989) 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, 14942311764 + ... + 14942312209.

It is an arithmetic number, because the mean of its divisors is an integer number (1673538942544).

Almost surely, 2^{6664271145979} is an apocalyptic number.

6664271145979 is a deficient number, since it is larger than the sum of its proper divisors (29884624197).

6664271145979 is a wasteful number, since it uses less digits than its factorization.

6664271145979 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29884624196.

The product of its digits is 137168640, while the sum is 67.

The spelling of 6664271145979 in words is "six trillion, six hundred sixty-four billion, two hundred seventy-one million, one hundred forty-five thousand, nine hundred seventy-nine".