7664774879 has 4 divisors (see below), whose sum is σ = 7665019920. Its totient is φ = 7664529840.

The previous prime is 7664774851. The next prime is 7664774927. The reversal of 7664774879 is 9784774667.

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 7664774879 - 2²⁰ = 7663726303 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 (7664774839) 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, 67307 + ... + 140924.

It is an arithmetic number, because the mean of its divisors is an integer number (1916254980).

Almost surely, 2^7664774879 is an apocalyptic number.

7664774879 is a deficient number, since it is larger than the sum of its proper divisors (245041).

7664774879 is a wasteful number, since it uses less digits than its factorization.

7664774879 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 245040.

The product of its digits is 99574272, while the sum is 65.

The square root of 7664774879 is about 87548.7000417482. The cubic root of 7664774879 is about 1971.6650338725.

The spelling of 7664774879 in words is "seven billion, six hundred sixty-four million, seven hundred seventy-four thousand, eight hundred seventy-nine".