680641870 has 32 divisors (see below), whose sum is σ = 1236197376. Its totient is φ = 269815200.

The previous prime is 680641837. The next prime is 680641891. The reversal of 680641870 is 78146086.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 700485 + ... + 701455.

It is an arithmetic number, because the mean of its divisors is an integer number (38631168).

Almost surely, 2^680641870 is an apocalyptic number.

680641870 is a deficient number, since it is larger than the sum of its proper divisors (555555506).

680641870 is a wasteful number, since it uses less digits than its factorization.

680641870 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1536.

The product of its (nonzero) digits is 64512, while the sum is 40.

The square root of 680641870 is about 26089.1140133198. The cubic root of 680641870 is about 879.6425330146.

The spelling of 680641870 in words is "six hundred eighty million, six hundred forty-one thousand, eight hundred seventy".