679131618777 has 24 divisors (see below), whose sum is σ = 999964380480. Its totient is φ = 444023264160.

The previous prime is 679131618727. The next prime is 679131618839. The reversal of 679131618777 is 777816131976.

679131618777 is a `hidden beast` number, since 6 + 7 + 9 + 1 + 3 + 1 + 618 + 7 + 7 + 7 = 666.

It is not a de Polignac number, because 679131618777 - 2¹⁰ = 679131617753 is a prime.

It is a super-2 number, since 2×679131618777² (a number of 24 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (679131618727) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1295413 + ... + 1742514.

It is an arithmetic number, because the mean of its divisors is an integer number (41665182520).

Almost surely, 2^679131618777 is an apocalyptic number.

It is an amenable number.

679131618777 is a deficient number, since it is larger than the sum of its proper divisors (320832761703).

679131618777 is a wasteful number, since it uses less digits than its factorization.

679131618777 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3038413 (or 3038410 counting only the distinct ones).

The product of its digits is 18670176, while the sum is 63.

The spelling of 679131618777 in words is "six hundred seventy-nine billion, one hundred thirty-one million, six hundred eighteen thousand, seven hundred seventy-seven".