165166550239 has 2 divisors, whose sum is σ = 165166550240. Its totient is φ = 165166550238.

The previous prime is 165166550111. The next prime is 165166550243. The reversal of 165166550239 is 932055661561.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 165166550239 - 2⁷ = 165166550111 is a prime.

It is a super-2 number, since 2×165166550239² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 165166550192 and 165166550201.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (165166550299) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 82583275119 + 82583275120.

It is an arithmetic number, because the mean of its divisors is an integer number (82583275120).

Almost surely, 2^165166550239 is an apocalyptic number.

165166550239 is a deficient number, since it is larger than the sum of its proper divisors (1).

165166550239 is an equidigital number, since it uses as much as digits as its factorization.

165166550239 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1458000, while the sum is 49.

The spelling of 165166550239 in words is "one hundred sixty-five billion, one hundred sixty-six million, five hundred fifty thousand, two hundred thirty-nine".