679881755 has 8 divisors (see below), whose sum is σ = 932409312. Its totient is φ = 466204608.

The previous prime is 679881691. The next prime is 679881757. The reversal of 679881755 is 557188976.

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 679881755 - 2⁶ = 679881691 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 679881755.

It is not an unprimeable number, because it can be changed into a prime (679881757) 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, 9712562 + ... + 9712631.

It is an arithmetic number, because the mean of its divisors is an integer number (116551164).

Almost surely, 2^679881755 is an apocalyptic number.

679881755 is a deficient number, since it is larger than the sum of its proper divisors (252527557).

679881755 is a wasteful number, since it uses less digits than its factorization.

679881755 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19425205.

The product of its digits is 4233600, while the sum is 56.

The square root of 679881755 is about 26074.5422778618. The cubic root of 679881755 is about 879.3149605823.

The spelling of 679881755 in words is "six hundred seventy-nine million, eight hundred eighty-one thousand, seven hundred fifty-five".