186864066 has 12 divisors (see below), whose sum is σ = 404872182. Its totient is φ = 62288016.

The previous prime is 186864059. The next prime is 186864071. The reversal of 186864066 is 660468681.

It can be written as a sum of positive squares in only one way, i.e., 163098441 + 23765625 = 12771^2 + 4875^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 5190651 + ... + 5190686.

Almost surely, 2^186864066 is an apocalyptic number.

186864066 is an abundant number, since it is smaller than the sum of its proper divisors (218008116).

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

186864066 is a wasteful number, since it uses less digits than its factorization.

186864066 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10381345 (or 10381342 counting only the distinct ones).

The product of its (nonzero) digits is 331776, while the sum is 45.

The square root of 186864066 is about 13669.8231883225. The cubic root of 186864066 is about 571.7093103797.

The spelling of 186864066 in words is "one hundred eighty-six million, eight hundred sixty-four thousand, sixty-six".