189982666 has 8 divisors (see below), whose sum is σ = 286003620. Its totient is φ = 94648128.

The previous prime is 189982657. The next prime is 189982697. The reversal of 189982666 is 666289981.

It can be written as a sum of positive squares in 2 ways, for example, as 189640441 + 342225 = 13771^2 + 585^2 .

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 170911 + ... + 172018.

Almost surely, 2^189982666 is an apocalyptic number.

189982666 is a deficient number, since it is larger than the sum of its proper divisors (96020954).

189982666 is a wasteful number, since it uses less digits than its factorization.

189982666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 343208.

The product of its digits is 2239488, while the sum is 55.

The square root of 189982666 is about 13783.4199674827. The cubic root of 189982666 is about 574.8722246642.

The spelling of 189982666 in words is "one hundred eighty-nine million, nine hundred eighty-two thousand, six hundred sixty-six".