676129581 has 6 divisors (see below), whose sum is σ = 976631630. Its totient is φ = 450753048.

The previous prime is 676129579. The next prime is 676129589. The reversal of 676129581 is 185921676.

676129581 is a `hidden beast` number, since 6 + 7 + 61 + 2 + 9 + 581 = 666.

676129581 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 636552900 + 39576681 = 25230^2 + 6291^2 .

It is not a de Polignac number, because 676129581 - 2¹ = 676129579 is a prime.

It is a super-2 number, since 2×676129581² = 914302420606471122, 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 (676129589) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 37562746 + ... + 37562763.

Almost surely, 2^676129581 is an apocalyptic number.

It is an amenable number.

676129581 is a deficient number, since it is larger than the sum of its proper divisors (300502049).

676129581 is a wasteful number, since it uses less digits than its factorization.

676129581 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 75125515 (or 75125512 counting only the distinct ones).

The product of its digits is 181440, while the sum is 45.

The square root of 676129581 is about 26002.4918229004. The cubic root of 676129581 is about 877.6943694886.

The spelling of 676129581 in words is "six hundred seventy-six million, one hundred twenty-nine thousand, five hundred eighty-one".