2090166642 has 24 divisors (see below), whose sum is σ = 4553721900. Its totient is φ = 692871840.

The previous prime is 2090166601. The next prime is 2090166697. The reversal of 2090166642 is 2466610902.

It can be written as a sum of positive squares in 2 ways, for example, as 1763244081 + 326922561 = 41991^2 + 18081^2 .

It is a junction number, because it is equal to n+sod(n) for n = 2090166597 and 2090166606.

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 11 ways as a sum of consecutive naturals, for example, 317517 + ... + 324032.

Almost surely, 2^2090166642 is an apocalyptic number.

2090166642 is an abundant number, since it is smaller than the sum of its proper divisors (2463555258).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2090166642 is a wasteful number, since it uses less digits than its factorization.

2090166642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 641738 (or 641735 counting only the distinct ones).

The product of its (nonzero) digits is 31104, while the sum is 36.

The square root of 2090166642 is about 45718.3403242069. The cubic root of 2090166642 is about 1278.5772444303.

The spelling of 2090166642 in words is "two billion, ninety million, one hundred sixty-six thousand, six hundred forty-two".