66088816 has 30 divisors (see below), whose sum is σ = 129675480. Its totient is φ = 32629248.

The previous prime is 66088777. The next prime is 66088829. The reversal of 66088816 is 61888066.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 150325 + ... + 150763.

It is an arithmetic number, because the mean of its divisors is an integer number (4322516).

Almost surely, 2^66088816 is an apocalyptic number.

It is an amenable number.

66088816 is a deficient number, since it is larger than the sum of its proper divisors (63586664).

66088816 is an equidigital number, since it uses as much as digits as its factorization.

66088816 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 641 (or 538 counting only the distinct ones).

The product of its (nonzero) digits is 110592, while the sum is 43.

The square root of 66088816 is about 8129.5028138257. The cubic root of 66088816 is about 404.3051969570.

The spelling of 66088816 in words is "sixty-six million, eighty-eight thousand, eight hundred sixteen".