613325665 has 12 divisors (see below), whose sum is σ = 743713596. Its totient is φ = 485564928.

The previous prime is 613325651. The next prime is 613325707. The reversal of 613325665 is 566523316.

It can be written as a sum of positive squares in 6 ways, for example, as 614656 + 612711009 = 784^2 + 24753^2 .

It is not a de Polignac number, because 613325665 - 2²⁹ = 76454753 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 40527 + ... + 53563.

It is an arithmetic number, because the mean of its divisors is an integer number (61976133).

Almost surely, 2^613325665 is an apocalyptic number.

It is an amenable number.

613325665 is a deficient number, since it is larger than the sum of its proper divisors (130387931).

613325665 is an equidigital number, since it uses as much as digits as its factorization.

613325665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13236 (or 13139 counting only the distinct ones).

The product of its digits is 97200, while the sum is 37.

The square root of 613325665 is about 24765.4126757460. The cubic root of 613325665 is about 849.6310578771.

The spelling of 613325665 in words is "six hundred thirteen million, three hundred twenty-five thousand, six hundred sixty-five".