674668135 has 4 divisors (see below), whose sum is σ = 809601768. Its totient is φ = 539734504.

The previous prime is 674668123. The next prime is 674668139. The reversal of 674668135 is 531866476.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-674668135 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 (674668139) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 67466809 + ... + 67466818.

It is an arithmetic number, because the mean of its divisors is an integer number (202400442).

Almost surely, 2^674668135 is an apocalyptic number.

674668135 is a deficient number, since it is larger than the sum of its proper divisors (134933633).

674668135 is a wasteful number, since it uses less digits than its factorization.

674668135 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 134933632.

The product of its digits is 725760, while the sum is 46.

The square root of 674668135 is about 25974.3745834236. The cubic root of 674668135 is about 877.0615380239.

The spelling of 674668135 in words is "six hundred seventy-four million, six hundred sixty-eight thousand, one hundred thirty-five".