678779880 has 64 divisors (see below), whose sum is σ = 2065046400. Its totient is φ = 178456320.

The previous prime is 678779869. The next prime is 678779891. The reversal of 678779880 is 88977876.

678779880 is digitally balanced in base 6, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (678779869) and next prime (678779891).

It is a Harshad number since it is a multiple of its sum of digits (60).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 31315 + ... + 48354.

It is an arithmetic number, because the mean of its divisors is an integer number (32266350).

Almost surely, 2^678779880 is an apocalyptic number.

678779880 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

678779880 is an abundant number, since it is smaller than the sum of its proper divisors (1386266520).

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

678779880 is a wasteful number, since it uses less digits than its factorization.

678779880 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 79754 (or 79750 counting only the distinct ones).

The product of its (nonzero) digits is 9483264, while the sum is 60.

The square root of 678779880 is about 26053.4043840723. The cubic root of 678779880 is about 878.8396725087.

The spelling of 678779880 in words is "six hundred seventy-eight million, seven hundred seventy-nine thousand, eight hundred eighty".