676722256393 has 4 divisors (see below), whose sum is σ = 677011579920. Its totient is φ = 676432932868.

The previous prime is 676722256289. The next prime is 676722256403. The reversal of 676722256393 is 393652227676.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-676722256393 is a prime.

It is a Smith number, since the sum of its digits (58) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (676722206393) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 144658255 + ... + 144662932.

It is an arithmetic number, because the mean of its divisors is an integer number (169252894980).

Almost surely, 2^676722256393 is an apocalyptic number.

It is an amenable number.

676722256393 is a deficient number, since it is larger than the sum of its proper divisors (289323527).

676722256393 is a wasteful number, since it uses less digits than its factorization.

676722256393 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 289323526.

The product of its digits is 34292160, while the sum is 58.

The spelling of 676722256393 in words is "six hundred seventy-six billion, seven hundred twenty-two million, two hundred fifty-six thousand, three hundred ninety-three".