188420501066 has 8 divisors (see below), whose sum is σ = 323006573280. Its totient is φ = 80751643308.

The previous prime is 188420501051. The next prime is 188420501089. The reversal of 188420501066 is 660105024881.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a Curzon number.

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 3 ways as a sum of consecutive naturals, for example, 6729303596 + ... + 6729303623.

It is an arithmetic number, because the mean of its divisors is an integer number (40375821660).

Almost surely, 2^188420501066 is an apocalyptic number.

188420501066 is a deficient number, since it is larger than the sum of its proper divisors (134586072214).

188420501066 is a wasteful number, since it uses less digits than its factorization.

188420501066 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13458607228.

The product of its (nonzero) digits is 92160, while the sum is 41.

The spelling of 188420501066 in words is "one hundred eighty-eight billion, four hundred twenty million, five hundred one thousand, sixty-six".