66189008 has 20 divisors (see below), whose sum is σ = 134991360. Its totient is φ = 31352544.

The previous prime is 66189001. The next prime is 66189029. The reversal of 66189008 is 80098166.

It is a hoax number, since the sum of its digits (38) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (38).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66189001) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 108560 + ... + 109167.

It is an arithmetic number, because the mean of its divisors is an integer number (6749568).

Almost surely, 2^66189008 is an apocalyptic number.

It is an amenable number.

66189008 is an abundant number, since it is smaller than the sum of its proper divisors (68802352).

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

66189008 is a wasteful number, since it uses less digits than its factorization.

66189008 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 217754 (or 217748 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 38.

The square root of 66189008 is about 8135.6627265392. The cubic root of 66189008 is about 404.5094054529.

The spelling of 66189008 in words is "sixty-six million, one hundred eighty-nine thousand, eight".