1802811666 has 16 divisors (see below), whose sum is σ = 3607336224. Its totient is φ = 600651744.

The previous prime is 1802811653. The next prime is 1802811667. The reversal of 1802811666 is 6661182081.

It is not an unprimeable number, because it can be changed into a prime (1802811667) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 57480 + ... + 83123.

It is an arithmetic number, because the mean of its divisors is an integer number (225458514).

Almost surely, 2^1802811666 is an apocalyptic number.

1802811666 is an abundant number, since it is smaller than the sum of its proper divisors (1804524558).

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

1802811666 is a wasteful number, since it uses less digits than its factorization.

1802811666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 142745.

The product of its (nonzero) digits is 27648, while the sum is 39.

The square root of 1802811666 is about 42459.5297430388. The cubic root of 1802811666 is about 1217.0734444511.

The spelling of 1802811666 in words is "one billion, eight hundred two million, eight hundred eleven thousand, six hundred sixty-six".