157674661 has 4 divisors (see below), whose sum is σ = 157854112. Its totient is φ = 157495212.

The previous prime is 157674659. The next prime is 157674709. The reversal of 157674661 is 166476751.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 157674661 - 2¹ = 157674659 is a prime.

It is a super-2 number, since 2×157674661² = 49722597442929842, which contains 22 as substring.

It is a Duffinian number.

It is a nialpdrome in base 15.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (157674641) 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, 88401 + ... + 90166.

It is an arithmetic number, because the mean of its divisors is an integer number (39463528).

Almost surely, 2^157674661 is an apocalyptic number.

It is an amenable number.

157674661 is a deficient number, since it is larger than the sum of its proper divisors (179451).

157674661 is an equidigital number, since it uses as much as digits as its factorization.

157674661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 179450.

The product of its digits is 211680, while the sum is 43.

The square root of 157674661 is about 12556.8571306677. The cubic root of 157674661 is about 540.2407031624.

The spelling of 157674661 in words is "one hundred fifty-seven million, six hundred seventy-four thousand, six hundred sixty-one".