680077755 has 32 divisors (see below), whose sum is σ = 1381747200. Its totient is φ = 310892256.

The previous prime is 680077729. The next prime is 680077757. The reversal of 680077755 is 557770086.

It is not a de Polignac number, because 680077755 - 2⁷ = 680077627 is a prime.

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

It is a self number, because there is not a number n which added to its sum of digits gives 680077755.

It is not an unprimeable number, because it can be changed into a prime (680077757) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 358885 + ... + 360774.

It is an arithmetic number, because the mean of its divisors is an integer number (43179600).

Almost surely, 2^680077755 is an apocalyptic number.

680077755 is an abundant number, since it is smaller than the sum of its proper divisors (701669445).

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

680077755 is a wasteful number, since it uses less digits than its factorization.

680077755 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 719680 (or 719674 counting only the distinct ones).

The product of its (nonzero) digits is 411600, while the sum is 45.

The square root of 680077755 is about 26078.3004622617. The cubic root of 680077755 is about 879.3994503592.

The spelling of 680077755 in words is "six hundred eighty million, seventy-seven thousand, seven hundred fifty-five".