6657988079 has 8 divisors (see below), whose sum is σ = 6882035712. Its totient is φ = 6434520120.

The previous prime is 6657988067. The next prime is 6657988091. The reversal of 6657988079 is 9708897566.

6657988079 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (6657988067) and next prime (6657988091).

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 6657988079 - 2¹⁶ = 6657922543 is a prime.

It is a super-2 number, since 2×6657988079² = 88657610520212220482, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6657988039) 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, 121499 + ... + 167564.

It is an arithmetic number, because the mean of its divisors is an integer number (860254464).

Almost surely, 2^6657988079 is an apocalyptic number.

6657988079 is a deficient number, since it is larger than the sum of its proper divisors (224047633).

6657988079 is a wasteful number, since it uses less digits than its factorization.

6657988079 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 289837.

The product of its (nonzero) digits is 45722880, while the sum is 65.

The square root of 6657988079 is about 81596.4955068537. The cubic root of 6657988079 is about 1881.2550167539.

The spelling of 6657988079 in words is "six billion, six hundred fifty-seven million, nine hundred eighty-eight thousand, seventy-nine".