187116666 has 64 divisors (see below), whose sum is σ = 420443136. Its totient is φ = 55036800.

The previous prime is 187116649. The next prime is 187116679. The reversal of 187116666 is 666611781.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 341805 + ... + 342351.

It is an arithmetic number, because the mean of its divisors is an integer number (6569424).

Almost surely, 2^187116666 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 187116666, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (210221568).

187116666 is an abundant number, since it is smaller than the sum of its proper divisors (233326470).

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

187116666 is a wasteful number, since it uses less digits than its factorization.

187116666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 707.

The product of its digits is 72576, while the sum is 42.

The square root of 187116666 is about 13679.0593974878. The cubic root of 187116666 is about 571.9668037037.

The spelling of 187116666 in words is "one hundred eighty-seven million, one hundred sixteen thousand, six hundred sixty-six".