157070665 has 4 divisors (see below), whose sum is σ = 188484804. Its totient is φ = 125656528.

The previous prime is 157070651. The next prime is 157070731. The reversal of 157070665 is 566070751.

157070665 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 46063369 + 111007296 = 6787^2 + 10536^2 .

It is a cyclic number.

It is not a de Polignac number, because 157070665 - 2¹⁵ = 157037897 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15707062 + ... + 15707071.

It is an arithmetic number, because the mean of its divisors is an integer number (47121201).

Almost surely, 2^157070665 is an apocalyptic number.

It is an amenable number.

157070665 is a deficient number, since it is larger than the sum of its proper divisors (31414139).

157070665 is an equidigital number, since it uses as much as digits as its factorization.

157070665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31414138.

The product of its (nonzero) digits is 44100, while the sum is 37.

The square root of 157070665 is about 12532.7836093982. The cubic root of 157070665 is about 539.5499966120.

It can be divided in two parts, 15 and 7070665, that added together give a triangular number (7070680 = T₃₇₆₀).

The spelling of 157070665 in words is "one hundred fifty-seven million, seventy thousand, six hundred sixty-five".