676415521 has 8 divisors (see below), whose sum is σ = 689838120. Its totient is φ = 663017472.

The previous prime is 676415513. The next prime is 676415549. The reversal of 676415521 is 125514676.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 114725521 + 561690000 = 10711^2 + 23700^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 676415521 - 2³ = 676415513 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (676415501) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 55575 + ... + 66643.

It is an arithmetic number, because the mean of its divisors is an integer number (86229765).

Almost surely, 2^676415521 is an apocalyptic number.

It is an amenable number.

676415521 is a deficient number, since it is larger than the sum of its proper divisors (13422599).

676415521 is a wasteful number, since it uses less digits than its factorization.

676415521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12275.

The product of its digits is 50400, while the sum is 37.

The square root of 676415521 is about 26007.9895609022. The cubic root of 676415521 is about 877.8180797776.

The spelling of 676415521 in words is "six hundred seventy-six million, four hundred fifteen thousand, five hundred twenty-one".