66090192 has 80 divisors (see below), whose sum is σ = 196177920. Its totient is φ = 18781056.

The previous prime is 66090187. The next prime is 66090209. The reversal of 66090192 is 29109066.

It is a happy number.

66090192 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 15 ways as a sum of consecutive naturals, for example, 79893 + ... + 80715.

It is an arithmetic number, because the mean of its divisors is an integer number (2452224).

Almost surely, 2^66090192 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 66090192, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (98088960).

66090192 is an abundant number, since it is smaller than the sum of its proper divisors (130087728).

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

66090192 is a wasteful number, since it uses less digits than its factorization.

66090192 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1080 (or 1074 counting only the distinct ones).

The product of its (nonzero) digits is 5832, while the sum is 33.

The square root of 66090192 is about 8129.5874434070. The cubic root of 66090192 is about 404.3080028785.

The spelling of 66090192 in words is "sixty-six million, ninety thousand, one hundred ninety-two".