676681 has 4 divisors (see below), whose sum is σ = 679572. Its totient is φ = 673792.

The previous prime is 676679. The next prime is 676703. The reversal of 676681 is 186676.

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 435600 + 241081 = 660^2 + 491^2 .

It is a cyclic number.

It is not a de Polignac number, because 676681 - 2¹ = 676679 is a prime.

It is a super-2 number, since 2×676681² = 915794351522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (676601) 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, 1060 + ... + 1573.

It is an arithmetic number, because the mean of its divisors is an integer number (169893).

2⁶⁷⁶⁶⁸¹ is an apocalyptic number.

It is an amenable number.

676681 is a deficient number, since it is larger than the sum of its proper divisors (2891).

676681 is a wasteful number, since it uses less digits than its factorization.

676681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2890.

The product of its digits is 12096, while the sum is 34.

The square root of 676681 is about 822.6062241437. The cubic root of 676681 is about 87.7932906526.

The spelling of 676681 in words is "six hundred seventy-six thousand, six hundred eighty-one".