674673665 has 16 divisors (see below), whose sum is σ = 823785168. Its totient is φ = 530343936.

The previous prime is 674673647. The next prime is 674673683. The reversal of 674673665 is 566376476.

It is an interprime number because it is at equal distance from previous prime (674673647) and next prime (674673683).

It can be written as a sum of positive squares in 8 ways, for example, as 162511504 + 512162161 = 12748^2 + 22631^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-674673665 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 97769 + ... + 104441.

It is an arithmetic number, because the mean of its divisors is an integer number (51486573).

Almost surely, 2^674673665 is an apocalyptic number.

It is an amenable number.

674673665 is a deficient number, since it is larger than the sum of its proper divisors (149111503).

674673665 is a wasteful number, since it uses less digits than its factorization.

674673665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7028.

The product of its digits is 3810240, while the sum is 50.

The square root of 674673665 is about 25974.4810342767. The cubic root of 674673665 is about 877.0639343315.

The spelling of 674673665 in words is "six hundred seventy-four million, six hundred seventy-three thousand, six hundred sixty-five".