674818581 has 8 divisors (see below), whose sum is σ = 900121024. Its totient is φ = 449697600.

The previous prime is 674818541. The next prime is 674818583. The reversal of 674818581 is 185818476.

It is a happy number.

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

It is not a de Polignac number, because 674818581 - 2¹¹ = 674816533 is a prime.

It is a super-2 number, since 2×674818581² = 910760234525707122, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 674818581.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (674818583) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 36436 + ... + 51741.

It is an arithmetic number, because the mean of its divisors is an integer number (112515128).

Almost surely, 2^674818581 is an apocalyptic number.

It is an amenable number.

674818581 is a deficient number, since it is larger than the sum of its proper divisors (225302443).

674818581 is a wasteful number, since it uses less digits than its factorization.

674818581 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 90731.

The product of its digits is 430080, while the sum is 48.

The square root of 674818581 is about 25977.2704686231. The cubic root of 674818581 is about 877.1267259222.

The spelling of 674818581 in words is "six hundred seventy-four million, eight hundred eighteen thousand, five hundred eighty-one".