676608561 has 12 divisors (see below), whose sum is σ = 977678260. Its totient is φ = 450908640.

The previous prime is 676608533. The next prime is 676608587. The reversal of 676608561 is 165806676.

It can be written as a sum of positive squares in 2 ways, for example, as 304851600 + 371756961 = 17460^2 + 19281^2 .

It is not a de Polignac number, because 676608561 - 2⁶ = 676608497 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (676601561) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 15891 + ... + 40071.

Almost surely, 2^676608561 is an apocalyptic number.

It is an amenable number.

676608561 is a deficient number, since it is larger than the sum of its proper divisors (301069699).

676608561 is a wasteful number, since it uses less digits than its factorization.

676608561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27296 (or 27293 counting only the distinct ones).

The product of its (nonzero) digits is 362880, while the sum is 45.

The square root of 676608561 is about 26011.7004634453. The cubic root of 676608561 is about 877.9015777063.

The spelling of 676608561 in words is "six hundred seventy-six million, six hundred eight thousand, five hundred sixty-one".