1866400984106 has 8 divisors (see below), whose sum is σ = 2799623645280. Its totient is φ = 933193102348.

The previous prime is 1866400984027. The next prime is 1866400984163. The reversal of 1866400984106 is 6014890046681.

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

It is a super-3 number, since 3×1866400984106³ (a number of 38 digits) contains 333 as substring.

It is a Curzon number.

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, 3373556 + ... + 3887631.

It is an arithmetic number, because the mean of its divisors is an integer number (349952955660).

Almost surely, 2^{1866400984106} is an apocalyptic number.

1866400984106 is a deficient number, since it is larger than the sum of its proper divisors (933222661174).

1866400984106 is a wasteful number, since it uses less digits than its factorization.

1866400984106 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7389708.

The product of its (nonzero) digits is 1990656, while the sum is 53.

The spelling of 1866400984106 in words is "one trillion, eight hundred sixty-six billion, four hundred million, nine hundred eighty-four thousand, one hundred six".