166115023 has 2 divisors, whose sum is σ = 166115024. Its totient is φ = 166115022.

The previous prime is 166115021. The next prime is 166115069. The reversal of 166115023 is 320511661.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 166115023 - 2¹ = 166115021 is a prime.

Together with 166115021, 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 (166115021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 83057511 + 83057512.

It is an arithmetic number, because the mean of its divisors is an integer number (83057512).

Almost surely, 2^166115023 is an apocalyptic number.

166115023 is a deficient number, since it is larger than the sum of its proper divisors (1).

166115023 is an equidigital number, since it uses as much as digits as its factorization.

166115023 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1080, while the sum is 25.

The square root of 166115023 is about 12888.5617118436. The cubic root of 166115023 is about 549.7133746218.

Adding to 166115023 its reverse (320511661), we get a palindrome (486626684).

The spelling of 166115023 in words is "one hundred sixty-six million, one hundred fifteen thousand, twenty-three".