66189294 has 24 divisors (see below), whose sum is σ = 143799552. Its totient is φ = 22003200.

The previous prime is 66189271. The next prime is 66189307. The reversal of 66189294 is 49298166.

It is a happy number.

66189294 is a `hidden beast` number, since 6 + 618 + 9 + 29 + 4 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2094 + ... + 11694.

It is an arithmetic number, because the mean of its divisors is an integer number (5991648).

Almost surely, 2^66189294 is an apocalyptic number.

66189294 is an abundant number, since it is smaller than the sum of its proper divisors (77610258).

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

66189294 is a wasteful number, since it uses less digits than its factorization.

66189294 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9992 (or 9989 counting only the distinct ones).

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

The square root of 66189294 is about 8135.6803034534. The cubic root of 66189294 is about 404.5099880749.

The spelling of 66189294 in words is "sixty-six million, one hundred eighty-nine thousand, two hundred ninety-four".