90208666 has 8 divisors (see below), whose sum is σ = 137332800. Its totient is φ = 44431068.

The previous prime is 90208649. The next prime is 90208669. The reversal of 90208666 is 66680209.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (90208669) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 336466 + ... + 336733.

It is an arithmetic number, because the mean of its divisors is an integer number (17166600).

Almost surely, 2^90208666 is an apocalyptic number.

90208666 is a deficient number, since it is larger than the sum of its proper divisors (47124134).

90208666 is a wasteful number, since it uses less digits than its factorization.

90208666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 673268.

The product of its (nonzero) digits is 31104, while the sum is 37.

The square root of 90208666 is about 9497.8242771700. The cubic root of 90208666 is about 448.4865468925.

The spelling of 90208666 in words is "ninety million, two hundred eight thousand, six hundred sixty-six".