6651318679 has 4 divisors (see below), whose sum is σ = 6652248784. Its totient is φ = 6650388576.

The previous prime is 6651318673. The next prime is 6651318743. The reversal of 6651318679 is 9768131566.

It is a happy number.

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 6651318679 - 2²³ = 6642930071 is a prime.

It is a super-2 number, since 2×6651318679² = 88480080339228610082, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6651318673) 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, 454242 + ... + 468655.

It is an arithmetic number, because the mean of its divisors is an integer number (1663062196).

Almost surely, 2^6651318679 is an apocalyptic number.

6651318679 is a deficient number, since it is larger than the sum of its proper divisors (930105).

6651318679 is an equidigital number, since it uses as much as digits as its factorization.

6651318679 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 930104.

The product of its digits is 1632960, while the sum is 52.

The square root of 6651318679 is about 81555.6170904249. The cubic root of 6651318679 is about 1880.6266470501.

The spelling of 6651318679 in words is "six billion, six hundred fifty-one million, three hundred eighteen thousand, six hundred seventy-nine".