1866434463 has 6 divisors (see below), whose sum is σ = 2695960904. Its totient is φ = 1244289636.

The previous prime is 1866434459. The next prime is 1866434473. The reversal of 1866434463 is 3644346681.

It is a happy number.

1866434463 is a `hidden beast` number, since 186 + 6 + 4 + 3 + 4 + 463 = 666.

It is not a de Polignac number, because 1866434463 - 2² = 1866434459 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1866434473) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 103690795 + ... + 103690812.

Almost surely, 2^1866434463 is an apocalyptic number.

1866434463 is a deficient number, since it is larger than the sum of its proper divisors (829526441).

1866434463 is a wasteful number, since it uses less digits than its factorization.

1866434463 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 207381613 (or 207381610 counting only the distinct ones).

The product of its digits is 995328, while the sum is 45.

The square root of 1866434463 is about 43202.2506705380. The cubic root of 1866434463 is about 1231.2254433746.

The spelling of 1866434463 in words is "one billion, eight hundred sixty-six million, four hundred thirty-four thousand, four hundred sixty-three".