157011665 has 4 divisors (see below), whose sum is σ = 188414004. Its totient is φ = 125609328.

The previous prime is 157011661. The next prime is 157011667. The reversal of 157011665 is 566110751.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 566110751 = 3167 ⋅178753.

It can be written as a sum of positive squares in 2 ways, for example, as 109014481 + 47997184 = 10441^2 + 6928^2 .

It is a cyclic number.

It is not a de Polignac number, because 157011665 - 2² = 157011661 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (157011661) 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, 15701162 + ... + 15701171.

It is an arithmetic number, because the mean of its divisors is an integer number (47103501).

Almost surely, 2^157011665 is an apocalyptic number.

It is an amenable number.

157011665 is a deficient number, since it is larger than the sum of its proper divisors (31402339).

157011665 is an equidigital number, since it uses as much as digits as its factorization.

157011665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31402338.

The product of its (nonzero) digits is 6300, while the sum is 32.

The square root of 157011665 is about 12530.4295616711. The cubic root of 157011665 is about 539.4824316162.

The spelling of 157011665 in words is "one hundred fifty-seven million, eleven thousand, six hundred sixty-five".