677679 has 8 divisors (see below), whose sum is σ = 907440. Its totient is φ = 449856.

The previous prime is 677657. The next prime is 677681. The reversal of 677679 is 976776.

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

It is not a de Polignac number, because 677679 - 2⁵ = 677647 is a prime.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a self number, because there is not a number n which added to its sum of digits gives 677679.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (677639) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 907 + ... + 1475.

It is an arithmetic number, because the mean of its divisors is an integer number (113430).

2⁶⁷⁷⁶⁷⁹ is an apocalyptic number.

677679 is a deficient number, since it is larger than the sum of its proper divisors (229761).

677679 is a wasteful number, since it uses less digits than its factorization.

677679 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 969.

The product of its digits is 111132, while the sum is 42.

The square root of 677679 is about 823.2126092329. The cubic root of 677679 is about 87.8364299679.

It can be divided in two parts, 67767 and 9, that added together give a palindrome (67776).

The spelling of 677679 in words is "six hundred seventy-seven thousand, six hundred seventy-nine".