157570661 has 4 divisors (see below), whose sum is σ = 159043392. Its totient is φ = 156097932.

The previous prime is 157570627. The next prime is 157570663. The reversal of 157570661 is 166075751.

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 157570661 - 2⁶ = 157570597 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 (157570663) 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 3 ways as a sum of consecutive naturals, for example, 736205 + ... + 736418.

It is an arithmetic number, because the mean of its divisors is an integer number (39760848).

Almost surely, 2^157570661 is an apocalyptic number.

It is an amenable number.

157570661 is a deficient number, since it is larger than the sum of its proper divisors (1472731).

157570661 is a wasteful number, since it uses less digits than its factorization.

157570661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1472730.

The product of its (nonzero) digits is 44100, while the sum is 38.

The square root of 157570661 is about 12552.7152839535. The cubic root of 157570661 is about 540.1218986353.

The spelling of 157570661 in words is "one hundred fifty-seven million, five hundred seventy thousand, six hundred sixty-one".