189522666 has 40 divisors (see below), whose sum is σ = 426578724. Its totient is φ = 62890560.

The previous prime is 189522631. The next prime is 189522677. The reversal of 189522666 is 666225981.

It can be written as a sum of positive squares in 2 ways, for example, as 188375625 + 1147041 = 13725^2 + 1071^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 35236 + ... + 40256.

Almost surely, 2^189522666 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 189522666, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (213289362).

189522666 is an abundant number, since it is smaller than the sum of its proper divisors (237056058).

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

189522666 is a wasteful number, since it uses less digits than its factorization.

189522666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5268 (or 5259 counting only the distinct ones).

The product of its digits is 311040, while the sum is 45.

The square root of 189522666 is about 13766.7231395129. The cubic root of 189522666 is about 574.4078753902.

The spelling of 189522666 in words is "one hundred eighty-nine million, five hundred twenty-two thousand, six hundred sixty-six".