157660169 has 4 divisors (see below), whose sum is σ = 157948944. Its totient is φ = 157371396.

The previous prime is 157660133. The next prime is 157660171. The reversal of 157660169 is 961066751.

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, and also an emirpimes, since its reverse is a distinct semiprime: 961066751 = 20681 ⋅46471.

It is a cyclic number.

It is not a de Polignac number, because 157660169 - 2⁸ = 157659913 is a prime.

It is a super-2 number, since 2×157660169² = 49713457778217122, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (157660109) 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, 143567 + ... + 144660.

It is an arithmetic number, because the mean of its divisors is an integer number (39487236).

Almost surely, 2^157660169 is an apocalyptic number.

It is an amenable number.

157660169 is a deficient number, since it is larger than the sum of its proper divisors (288775).

157660169 is an equidigital number, since it uses as much as digits as its factorization.

157660169 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 288774.

The product of its (nonzero) digits is 68040, while the sum is 41.

The square root of 157660169 is about 12556.2800621840. The cubic root of 157660169 is about 540.2241513417.

The spelling of 157660169 in words is "one hundred fifty-seven million, six hundred sixty thousand, one hundred sixty-nine".