1668090426 has 32 divisors (see below), whose sum is σ = 3352803840. Its totient is φ = 553268016.

The previous prime is 1668090379. The next prime is 1668090461. The reversal of 1668090426 is 6240908661.

It is a super-2 number, since 2×1668090426² = 5565051338625722952, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1880155 + ... + 1881041.

It is an arithmetic number, because the mean of its divisors is an integer number (104775120).

Almost surely, 2^1668090426 is an apocalyptic number.

1668090426 is an abundant number, since it is smaller than the sum of its proper divisors (1684713414).

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

1668090426 is a wasteful number, since it uses less digits than its factorization.

1668090426 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2098.

The product of its (nonzero) digits is 124416, while the sum is 42.

The square root of 1668090426 is about 40842.2627433887. The cubic root of 1668090426 is about 1185.9686160763.

The spelling of 1668090426 in words is "one billion, six hundred sixty-eight million, ninety thousand, four hundred twenty-six".