680290066 has 16 divisors (see below), whose sum is σ = 1062379224. Its totient is φ = 326415744.

The previous prime is 680290063. The next prime is 680290073. The reversal of 680290066 is 660092086.

It can be written as a sum of positive squares in 4 ways, for example, as 633982041 + 46308025 = 25179^2 + 6805^2 .

It is a Harshad number since it is a multiple of its sum of digits (37).

It is not an unprimeable number, because it can be changed into a prime (680290063) 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, 57565 + ... + 68368.

Almost surely, 2^680290066 is an apocalyptic number.

680290066 is a deficient number, since it is larger than the sum of its proper divisors (382089158).

680290066 is a wasteful number, since it uses less digits than its factorization.

680290066 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 126045.

The product of its (nonzero) digits is 31104, while the sum is 37.

The square root of 680290066 is about 26082.3707894815. The cubic root of 680290066 is about 879.4909530095.

The spelling of 680290066 in words is "six hundred eighty million, two hundred ninety thousand, sixty-six".