677669 has 4 divisors (see below), whose sum is σ = 680160. Its totient is φ = 675180.

The previous prime is 677657. The next prime is 677681. The reversal of 677669 is 966776.

677669 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is an interprime number because it is at equal distance from previous prime (677657) and next prime (677681).

It is a cyclic number.

It is not a de Polignac number, because 677669 - 2¹² = 673573 is a prime.

It is a super-2 number, since 2×677669² = 918470547122, which contains 22 as substring.

It is a Duffinian number.

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 3 ways as a sum of consecutive naturals, for example, 779 + ... + 1400.

It is an arithmetic number, because the mean of its divisors is an integer number (170040).

2⁶⁷⁷⁶⁶⁹ is an apocalyptic number.

It is an amenable number.

677669 is a deficient number, since it is larger than the sum of its proper divisors (2491).

677669 is a wasteful number, since it uses less digits than its factorization.

677669 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2490.

The product of its digits is 95256, while the sum is 41.

The square root of 677669 is about 823.2065354454. The cubic root of 677669 is about 87.8359979204.

The spelling of 677669 in words is "six hundred seventy-seven thousand, six hundred sixty-nine".