290190638666 has 16 divisors (see below), whose sum is σ = 436842763656. Its totient is φ = 144576907776.

The previous prime is 290190638653. The next prime is 290190638681. The reversal of 290190638666 is 666836091092.

It can be written as a sum of positive squares in 4 ways, for example, as 246582758041 + 43607880625 = 496571^2 + 208825^2 .

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 in 7 ways as a sum of consecutive naturals, for example, 986900 + ... + 1246736.

Almost surely, 2^290190638666 is an apocalyptic number.

290190638666 is a deficient number, since it is larger than the sum of its proper divisors (146652124990).

290190638666 is a wasteful number, since it uses less digits than its factorization.

290190638666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 261833.

The product of its (nonzero) digits is 5038848, while the sum is 56.

The spelling of 290190638666 in words is "two hundred ninety billion, one hundred ninety million, six hundred thirty-eight thousand, six hundred sixty-six".