2090198666 has 8 divisors (see below), whose sum is σ = 3135498240. Its totient is φ = 1045032588.

The previous prime is 2090198657. The next prime is 2090198681. The reversal of 2090198666 is 6668910902.

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

It is a self number, because there is not a number n which added to its sum of digits gives 2090198666.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 29345 + ... + 71003.

It is an arithmetic number, because the mean of its divisors is an integer number (391937280).

Almost surely, 2^2090198666 is an apocalyptic number.

2090198666 is a deficient number, since it is larger than the sum of its proper divisors (1045299574).

2090198666 is a wasteful number, since it uses less digits than its factorization.

2090198666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66748.

The product of its (nonzero) digits is 279936, while the sum is 47.

The square root of 2090198666 is about 45718.6905543017. The cubic root of 2090198666 is about 1278.5837742045.

The spelling of 2090198666 in words is "two billion, ninety million, one hundred ninety-eight thousand, six hundred sixty-six".