1800166378 has 8 divisors (see below), whose sum is σ = 2715858468. Its totient is φ = 894880224.

The previous prime is 1800166367. The next prime is 1800166409. The reversal of 1800166378 is 8736610081.

It can be written as a sum of positive squares in 2 ways, for example, as 1352547729 + 447618649 = 36777^2 + 21157^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 1800166378.

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, 2601051 + ... + 2601742.

Almost surely, 2^1800166378 is an apocalyptic number.

1800166378 is a deficient number, since it is larger than the sum of its proper divisors (915692090).

1800166378 is a wasteful number, since it uses less digits than its factorization.

1800166378 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5202968.

The product of its (nonzero) digits is 48384, while the sum is 40.

The square root of 1800166378 is about 42428.3676094191. The cubic root of 1800166378 is about 1216.4778773897.

The spelling of 1800166378 in words is "one billion, eight hundred million, one hundred sixty-six thousand, three hundred seventy-eight".