900199666 has 4 divisors (see below), whose sum is σ = 1350299502. Its totient is φ = 450099832.

The previous prime is 900199621. The next prime is 900199679. The reversal of 900199666 is 666991009.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 874444041 + 25755625 = 29571^2 + 5075^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 225049915 + ... + 225049918.

Almost surely, 2^900199666 is an apocalyptic number.

900199666 is a deficient number, since it is larger than the sum of its proper divisors (450099836).

900199666 is a wasteful number, since it uses less digits than its factorization.

900199666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 450099835.

The product of its (nonzero) digits is 157464, while the sum is 46.

The square root of 900199666 is about 30003.3275821200. The cubic root of 900199666 is about 965.5607776239.

The spelling of 900199666 in words is "nine hundred million, one hundred ninety-nine thousand, six hundred sixty-six".