1805206668 has 24 divisors (see below), whose sum is σ = 4221378672. Its totient is φ = 600417024.

The previous prime is 1805206639. The next prime is 1805206673. The reversal of 1805206668 is 8666025081.

It is a super-2 number, since 2×1805206668² = 6517542228383324448, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 159105 + ... + 170072.

It is an arithmetic number, because the mean of its divisors is an integer number (175890778).

Almost surely, 2^1805206668 is an apocalyptic number.

It is an amenable number.

1805206668 is an abundant number, since it is smaller than the sum of its proper divisors (2416172004).

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

1805206668 is a wasteful number, since it uses less digits than its factorization.

1805206668 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 329641 (or 329639 counting only the distinct ones).

The product of its (nonzero) digits is 138240, while the sum is 42.

The square root of 1805206668 is about 42487.7237328619. The cubic root of 1805206668 is about 1217.6121591611.

The spelling of 1805206668 in words is "one billion, eight hundred five million, two hundred six thousand, six hundred sixty-eight".