1665160157 has 2 divisors, whose sum is σ = 1665160158. Its totient is φ = 1665160156.

The previous prime is 1665160129. The next prime is 1665160177. The reversal of 1665160157 is 7510615661.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1586110276 + 79049881 = 39826^2 + 8891^2 .

It is a cyclic number.

It is not a de Polignac number, because 1665160157 - 2⁶ = 1665160093 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1665160157.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1665160177) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 832580078 + 832580079.

It is an arithmetic number, because the mean of its divisors is an integer number (832580079).

Almost surely, 2^1665160157 is an apocalyptic number.

It is an amenable number.

1665160157 is a deficient number, since it is larger than the sum of its proper divisors (1).

1665160157 is an equidigital number, since it uses as much as digits as its factorization.

1665160157 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 37800, while the sum is 38.

The square root of 1665160157 is about 40806.3739751525. The cubic root of 1665160157 is about 1185.2737608645.

The spelling of 1665160157 in words is "one billion, six hundred sixty-five million, one hundred sixty thousand, one hundred fifty-seven".