189475666 has 4 divisors (see below), whose sum is σ = 284213502. Its totient is φ = 94737832.

The previous prime is 189475651. The next prime is 189475703. The reversal of 189475666 is 666574981.

189475666 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 666574981 = 17 ⋅39210293.

It can be written as a sum of positive squares in only one way, i.e., 189475225 + 441 = 13765^2 + 21^2 .

It is a super-2 number, since 2×189475666² = 71802056012287112, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 47368915 + ... + 47368918.

Almost surely, 2^189475666 is an apocalyptic number.

189475666 is a deficient number, since it is larger than the sum of its proper divisors (94737836).

189475666 is an equidigital number, since it uses as much as digits as its factorization.

189475666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 94737835.

The product of its digits is 2177280, while the sum is 52.

The square root of 189475666 is about 13765.0160188792. The cubic root of 189475666 is about 574.3603887180.

The spelling of 189475666 in words is "one hundred eighty-nine million, four hundred seventy-five thousand, six hundred sixty-six".