680618880 has 96 divisors (see below), whose sum is σ = 2350281960. Its totient is φ = 181496832.

The previous prime is 680618839. The next prime is 680618881. The reversal of 680618880 is 88816086.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (96).

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (680618881) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 53322 + ... + 64841.

Almost surely, 2^680618880 is an apocalyptic number.

680618880 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

680618880 is an abundant number, since it is smaller than the sum of its proper divisors (1669663080).

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

680618880 is a wasteful number, since it uses less digits than its factorization.

680618880 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 118188 (or 118173 counting only the distinct ones).

The product of its (nonzero) digits is 147456, while the sum is 45.

The square root of 680618880 is about 26088.6734043723. The cubic root of 680618880 is about 879.6326290252.

The spelling of 680618880 in words is "six hundred eighty million, six hundred eighteen thousand, eight hundred eighty".