679753993266 has 24 divisors (see below), whose sum is σ = 1473537903084. Its totient is φ = 226471189920.

The previous prime is 679753993253. The next prime is 679753993271. The reversal of 679753993266 is 662399357976.

It is a happy number.

679753993266 is a `hidden beast` number, since 67 + 9 + 7 + 539 + 9 + 3 + 26 + 6 = 666.

679753993266 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 590086685241 + 89667308025 = 768171^2 + 299445^2 .

It is a super-2 number, since 2×679753993266² (a number of 24 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 679753993194 and 679753993203.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 9419265 + ... + 9491156.

Almost surely, 2^679753993266 is an apocalyptic number.

679753993266 is an abundant number, since it is smaller than the sum of its proper divisors (793783909818).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

679753993266 is a wasteful number, since it uses less digits than its factorization.

679753993266 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18912426 (or 18912423 counting only the distinct ones).

The product of its digits is 694416240, while the sum is 72.

The spelling of 679753993266 in words is "six hundred seventy-nine billion, seven hundred fifty-three million, nine hundred ninety-three thousand, two hundred sixty-six".