185000000166 has 256 divisors, whose sum is σ = 452874240000. Its totient is φ = 55780358400.

The previous prime is 184999999981. The next prime is 185000000183. The reversal of 185000000166 is 661000000581.

It is a super-2 number, since 2×185000000166² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 594855151 + ... + 594855461.

It is an arithmetic number, because the mean of its divisors is an integer number (1769040000).

Almost surely, 2^185000000166 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 185000000166, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (226437120000).

185000000166 is an abundant number, since it is smaller than the sum of its proper divisors (267874239834).

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

185000000166 is a wasteful number, since it uses less digits than its factorization.

185000000166 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 640 (or 634 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 27.

The spelling of 185000000166 in words is "one hundred eighty-five billion, one hundred sixty-six", and thus it is an aban number.