676726991 has 16 divisors (see below), whose sum is σ = 709104000. Its totient is φ = 645267168.

The previous prime is 676726987. The next prime is 676727027. The reversal of 676726991 is 199627676.

It is a cyclic number.

It is not a de Polignac number, because 676726991 - 2² = 676726987 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (676726951) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 397460 + ... + 399158.

It is an arithmetic number, because the mean of its divisors is an integer number (44319000).

Almost surely, 2^676726991 is an apocalyptic number.

676726991 is a deficient number, since it is larger than the sum of its proper divisors (32377009).

676726991 is a wasteful number, since it uses less digits than its factorization.

676726991 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1958.

The product of its digits is 1714608, while the sum is 53.

The square root of 676726991 is about 26013.9768393839. The cubic root of 676726991 is about 877.9527958080.

The spelling of 676726991 in words is "six hundred seventy-six million, seven hundred twenty-six thousand, nine hundred ninety-one".