676661391 has 32 divisors (see below), whose sum is σ = 1150110720. Its totient is φ = 385165152.

The previous prime is 676661389. The next prime is 676661399. The reversal of 676661391 is 193166676.

It is not a de Polignac number, because 676661391 - 2¹ = 676661389 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (676661399) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 42901 + ... + 56513.

It is an arithmetic number, because the mean of its divisors is an integer number (35940960).

Almost surely, 2^676661391 is an apocalyptic number.

676661391 is a deficient number, since it is larger than the sum of its proper divisors (473449329).

676661391 is a wasteful number, since it uses less digits than its factorization.

676661391 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13892 (or 13886 counting only the distinct ones).

The product of its digits is 244944, while the sum is 45.

The square root of 676661391 is about 26012.7159481666. The cubic root of 676661391 is about 877.9244261379.

The spelling of 676661391 in words is "six hundred seventy-six million, six hundred sixty-one thousand, three hundred ninety-one".