677806491 has 8 divisors (see below), whose sum is σ = 915182080. Its totient is φ = 446150952.

The previous prime is 677806487. The next prime is 677806499. The reversal of 677806491 is 194608776.

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

It is not a de Polignac number, because 677806491 - 2² = 677806487 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 677806491.

It is not an unprimeable number, because it can be changed into a prime (677806499) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1429735 + ... + 1430208.

It is an arithmetic number, because the mean of its divisors is an integer number (114397760).

Almost surely, 2^677806491 is an apocalyptic number.

677806491 is a deficient number, since it is larger than the sum of its proper divisors (237375589).

677806491 is a wasteful number, since it uses less digits than its factorization.

677806491 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2860025.

The product of its (nonzero) digits is 508032, while the sum is 48.

The square root of 677806491 is about 26034.7170332232. The cubic root of 677806491 is about 878.4193781267.

The spelling of 677806491 in words is "six hundred seventy-seven million, eight hundred six thousand, four hundred ninety-one".