186768664 has 64 divisors (see below), whose sum is σ = 381888000. Its totient is φ = 85307904.

The previous prime is 186768649. The next prime is 186768667. The reversal of 186768664 is 466867681.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (186768667) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 938437 + ... + 938635.

It is an arithmetic number, because the mean of its divisors is an integer number (5967000).

Almost surely, 2^186768664 is an apocalyptic number.

It is an amenable number.

186768664 is an abundant number, since it is smaller than the sum of its proper divisors (195119336).

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

186768664 is a wasteful number, since it uses less digits than its factorization.

186768664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 392 (or 388 counting only the distinct ones).

The product of its digits is 2322432, while the sum is 52.

The square root of 186768664 is about 13666.3332317048. Note that the first 3 decimals coincide. The cubic root of 186768664 is about 571.6119998989.

The spelling of 186768664 in words is "one hundred eighty-six million, seven hundred sixty-eight thousand, six hundred sixty-four".