680656798 has 8 divisors (see below), whose sum is σ = 1074721320. Its totient is φ = 322416360.

The previous prime is 680656789. The next prime is 680656799. The reversal of 680656798 is 897656086.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×680656798² = 926587353327225608, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (680656799) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8955973 + ... + 8956048.

It is an arithmetic number, because the mean of its divisors is an integer number (134340165).

Almost surely, 2^680656798 is an apocalyptic number.

680656798 is a deficient number, since it is larger than the sum of its proper divisors (394064522).

680656798 is a wasteful number, since it uses less digits than its factorization.

680656798 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17912042.

The product of its (nonzero) digits is 4354560, while the sum is 55.

The square root of 680656798 is about 26089.4001080899. The cubic root of 680656798 is about 879.6489638109.

The spelling of 680656798 in words is "six hundred eighty million, six hundred fifty-six thousand, seven hundred ninety-eight".