680900666 has 16 divisors (see below), whose sum is σ = 1044127368. Its totient is φ = 332923200.

The previous prime is 680900617. The next prime is 680900681. The reversal of 680900666 is 666009086.

It can be written as a sum of positive squares in 4 ways, for example, as 402845041 + 278055625 = 20071^2 + 16675^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4976 + ... + 37236.

Almost surely, 2^680900666 is an apocalyptic number.

680900666 is a deficient number, since it is larger than the sum of its proper divisors (363226702).

680900666 is a wasteful number, since it uses less digits than its factorization.

680900666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32497.

The product of its (nonzero) digits is 93312, while the sum is 41.

The square root of 680900666 is about 26094.0733884152. The cubic root of 680900666 is about 879.7540057938.

The spelling of 680900666 in words is "six hundred eighty million, nine hundred thousand, six hundred sixty-six".