674657581 has 8 divisors (see below), whose sum is σ = 731368064. Its totient is φ = 618634800.

The previous prime is 674657579. The next prime is 674657603. The reversal of 674657581 is 185756476.

It is a happy number.

674657581 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 674657581 - 2¹ = 674657579 is a prime.

It is a super-2 number, since 2×674657581² = 910325703201543122, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (674657531) 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, 169881 + ... + 173806.

It is an arithmetic number, because the mean of its divisors is an integer number (91421008).

Almost surely, 2^674657581 is an apocalyptic number.

It is an amenable number.

674657581 is a deficient number, since it is larger than the sum of its proper divisors (56710483).

674657581 is a wasteful number, since it uses less digits than its factorization.

674657581 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 343851.

The product of its digits is 1411200, while the sum is 49.

The square root of 674657581 is about 25974.1714208558. The cubic root of 674657581 is about 877.0569646368.

The spelling of 674657581 in words is "six hundred seventy-four million, six hundred fifty-seven thousand, five hundred eighty-one".