6691255579 has 8 divisors (see below), whose sum is σ = 6940557360. Its totient is φ = 6443191776.

The previous prime is 6691255567. The next prime is 6691255589. The reversal of 6691255579 is 9755521966.

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 6691255579 - 2⁷ = 6691255451 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6691255559) 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, 298477 + ... + 320110.

It is an arithmetic number, because the mean of its divisors is an integer number (867569670).

Almost surely, 2^6691255579 is an apocalyptic number.

6691255579 is a deficient number, since it is larger than the sum of its proper divisors (249301781).

6691255579 is a wasteful number, since it uses less digits than its factorization.

6691255579 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 618989.

The product of its digits is 5103000, while the sum is 55.

The square root of 6691255579 is about 81800.0952261059. The cubic root of 6691255579 is about 1884.3831239980.

The spelling of 6691255579 in words is "six billion, six hundred ninety-one million, two hundred fifty-five thousand, five hundred seventy-nine".