1801666916 has 12 divisors (see below), whose sum is σ = 3603333888. Its totient is φ = 772142952.

The previous prime is 1801666883. The next prime is 1801666931. The reversal of 1801666916 is 6196661081.

1801666916 is an admirable number.

It is a hoax number, since the sum of its digits (44) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 32172596 + ... + 32172651.

It is an arithmetic number, because the mean of its divisors is an integer number (300277824).

Almost surely, 2^1801666916 is an apocalyptic number.

It is an amenable number.

1801666916 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

1801666916 is a wasteful number, since it uses less digits than its factorization.

1801666916 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64345258 (or 64345256 counting only the distinct ones).

The product of its (nonzero) digits is 93312, while the sum is 44.

The square root of 1801666916 is about 42446.0471186658. The cubic root of 1801666916 is about 1216.8157839958.

The spelling of 1801666916 in words is "one billion, eight hundred one million, six hundred sixty-six thousand, nine hundred sixteen".