165662869 has 2 divisors, whose sum is σ = 165662870. Its totient is φ = 165662868.

The previous prime is 165662867. The next prime is 165662899. The reversal of 165662869 is 968266561.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 103836100 + 61826769 = 10190^2 + 7863^2 .

It is a cyclic number.

It is not a de Polignac number, because 165662869 - 2¹ = 165662867 is a prime.

It is a super-2 number, since 2×165662869² = 54888372330622322, which contains 22 as substring.

Together with 165662867, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (165662863) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 82831434 + 82831435.

It is an arithmetic number, because the mean of its divisors is an integer number (82831435).

Almost surely, 2^165662869 is an apocalyptic number.

It is an amenable number.

165662869 is a deficient number, since it is larger than the sum of its proper divisors (1).

165662869 is an equidigital number, since it uses as much as digits as its factorization.

165662869 is an evil number, because the sum of its binary digits is even.

The product of its digits is 933120, while the sum is 49.

The square root of 165662869 is about 12871.0088571176. The cubic root of 165662869 is about 549.2141603723.

The spelling of 165662869 in words is "one hundred sixty-five million, six hundred sixty-two thousand, eight hundred sixty-nine".