676657 has 4 divisors (see below), whose sum is σ = 700020. Its totient is φ = 653296.

The previous prime is 676649. The next prime is 676661. The reversal of 676657 is 756676.

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 156816 + 519841 = 396^2 + 721^2 .

It is a cyclic number.

It is not a de Polignac number, because 676657 - 2³ = 676649 is a prime.

It is a super-6 number, since 6×676657⁶ (a number of 36 digits) contains 666666 as substring.

It is a Duffinian number.

It is a nialpdrome in base 16.

It is not an unprimeable number, because it can be changed into a prime (676057) 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, 11638 + ... + 11695.

It is an arithmetic number, because the mean of its divisors is an integer number (175005).

2⁶⁷⁶⁶⁵⁷ is an apocalyptic number.

It is an amenable number.

676657 is a deficient number, since it is larger than the sum of its proper divisors (23363).

676657 is a wasteful number, since it uses less digits than its factorization.

676657 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23362.

The product of its digits is 52920, while the sum is 37.

The square root of 676657 is about 822.5916362327. The cubic root of 676657 is about 87.7922527121.

It can be divided in two parts, 67 and 6657, that added together give a square (6724 = 82²).

The spelling of 676657 in words is "six hundred seventy-six thousand, six hundred fifty-seven".