674805157 has 24 divisors (see below), whose sum is σ = 779606856. Its totient is φ = 578617344.

The previous prime is 674805143. The next prime is 674805161. The reversal of 674805157 is 751508476.

It can be written as a sum of positive squares in 12 ways, for example, as 5755201 + 669049956 = 2399^2 + 25866^2 .

It is not a de Polignac number, because 674805157 - 2⁷ = 674805029 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 (674805557) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2625573 + ... + 2625829.

It is an arithmetic number, because the mean of its divisors is an integer number (32483619).

Almost surely, 2^674805157 is an apocalyptic number.

It is an amenable number.

674805157 is a deficient number, since it is larger than the sum of its proper divisors (104801699).

674805157 is a wasteful number, since it uses less digits than its factorization.

674805157 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 505 (or 396 counting only the distinct ones).

The product of its (nonzero) digits is 235200, while the sum is 43.

The square root of 674805157 is about 25977.0120876132. The cubic root of 674805157 is about 877.1209097283.

The spelling of 674805157 in words is "six hundred seventy-four million, eight hundred five thousand, one hundred fifty-seven".