165166550117 has 8 divisors (see below), whose sum is σ = 166781956224. Its totient is φ = 163551372048.

The previous prime is 165166550111. The next prime is 165166550239. The reversal of 165166550117 is 711055661561.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-165166550117 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (165166550111) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1645928 + ... + 1743390.

It is an arithmetic number, because the mean of its divisors is an integer number (20847744528).

Almost surely, 2^165166550117 is an apocalyptic number.

It is an amenable number.

165166550117 is a deficient number, since it is larger than the sum of its proper divisors (1615406107).

165166550117 is a wasteful number, since it uses less digits than its factorization.

165166550117 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 114019.

The product of its (nonzero) digits is 189000, while the sum is 44.

The spelling of 165166550117 in words is "one hundred sixty-five billion, one hundred sixty-six million, five hundred fifty thousand, one hundred seventeen".