676366561 has 6 divisors (see below), whose sum is σ = 732397110. Its totient is φ = 624338208.

The previous prime is 676366553. The next prime is 676366583. The reversal of 676366561 is 165663676.

It can be written as a sum of positive squares in 3 ways, for example, as 14899600 + 661466961 = 3860^2 + 25719^2 .

It is not a de Polignac number, because 676366561 - 2³ = 676366553 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (676366591) 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, 2000916 + ... + 2001253.

It is an arithmetic number, because the mean of its divisors is an integer number (122066185).

Almost surely, 2^676366561 is an apocalyptic number.

It is an amenable number.

676366561 is a deficient number, since it is larger than the sum of its proper divisors (56030549).

676366561 is a wasteful number, since it uses less digits than its factorization.

676366561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4002195 (or 4002182 counting only the distinct ones).

The product of its digits is 816480, while the sum is 46.

The square root of 676366561 is about 26007.0482946450. The cubic root of 676366561 is about 877.7968999905.

The spelling of 676366561 in words is "six hundred seventy-six million, three hundred sixty-six thousand, five hundred sixty-one".