189666406 has 12 divisors (see below), whose sum is σ = 285930972. Its totient is φ = 94358436.

The previous prime is 189666391. The next prime is 189666437. The reversal of 189666406 is 604666981.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 98505 + ... + 100411.

It is an arithmetic number, because the mean of its divisors is an integer number (23827581).

Almost surely, 2^189666406 is an apocalyptic number.

189666406 is a deficient number, since it is larger than the sum of its proper divisors (96264566).

189666406 is an equidigital number, since it uses as much as digits as its factorization.

189666406 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2355 (or 2132 counting only the distinct ones).

The product of its (nonzero) digits is 373248, while the sum is 46.

The square root of 189666406 is about 13771.9427097269. The cubic root of 189666406 is about 574.5530550762.

The spelling of 189666406 in words is "one hundred eighty-nine million, six hundred sixty-six thousand, four hundred six".