680557877 has 4 divisors (see below), whose sum is σ = 704025420. Its totient is φ = 657090336.

The previous prime is 680557859. The next prime is 680557937. The reversal of 680557877 is 778755086.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 423083761 + 257474116 = 20569^2 + 16046^2 .

It is a cyclic number.

It is not a de Polignac number, because 680557877 - 2⁸ = 680557621 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (680557807) 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, 11733728 + ... + 11733785.

It is an arithmetic number, because the mean of its divisors is an integer number (176006355).

Almost surely, 2^680557877 is an apocalyptic number.

It is an amenable number.

680557877 is a deficient number, since it is larger than the sum of its proper divisors (23467543).

680557877 is a wasteful number, since it uses less digits than its factorization.

680557877 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23467542.

The product of its (nonzero) digits is 3292800, while the sum is 53.

The square root of 680557877 is about 26087.5042309532. The cubic root of 680557877 is about 879.6063481241.

The spelling of 680557877 in words is "six hundred eighty million, five hundred fifty-seven thousand, eight hundred seventy-seven".