189266661 has 12 divisors (see below), whose sum is σ = 289466892. Its totient is φ = 118755456.

The previous prime is 189266659. The next prime is 189266663. The reversal of 189266661 is 166662981.

It is an interprime number because it is at equal distance from previous prime (189266659) and next prime (189266663).

It can be written as a sum of positive squares in 2 ways, for example, as 108805761 + 80460900 = 10431^2 + 8970^2 .

It is not a de Polignac number, because 189266661 - 2¹ = 189266659 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (189266663) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 618366 + ... + 618671.

It is an arithmetic number, because the mean of its divisors is an integer number (24122241).

Almost surely, 2^189266661 is an apocalyptic number.

It is an amenable number.

189266661 is a deficient number, since it is larger than the sum of its proper divisors (100200231).

189266661 is a wasteful number, since it uses less digits than its factorization.

189266661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1237060 (or 1237057 counting only the distinct ones).

The product of its digits is 186624, while the sum is 45.

The square root of 189266661 is about 13757.4220332154. The cubic root of 189266661 is about 574.1491243699.

The spelling of 189266661 in words is "one hundred eighty-nine million, two hundred sixty-six thousand, six hundred sixty-one".