165486195666 has 192 divisors, whose sum is σ = 433415232000. Its totient is φ = 46394691840.

The previous prime is 165486195643. The next prime is 165486195713. The reversal of 165486195666 is 666591684561.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 10120125 + ... + 10136463.

It is an arithmetic number, because the mean of its divisors is an integer number (2257371000).

Almost surely, 2^165486195666 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 165486195666, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (216707616000).

165486195666 is an abundant number, since it is smaller than the sum of its proper divisors (267929036334).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

165486195666 is a wasteful number, since it uses less digits than its factorization.

165486195666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16454 (or 16431 counting only the distinct ones).

The product of its digits is 55987200, while the sum is 63.

The spelling of 165486195666 in words is "one hundred sixty-five billion, four hundred eighty-six million, one hundred ninety-five thousand, six hundred sixty-six".