16663443755 has 16 divisors (see below), whose sum is σ = 22926219264. Its totient is φ = 11389613280.

The previous prime is 16663443677. The next prime is 16663443763. The reversal of 16663443755 is 55734436661.

It is not a de Polignac number, because 16663443755 - 2¹² = 16663439659 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 754547 + ... + 776316.

It is an arithmetic number, because the mean of its divisors is an integer number (1432888704).

Almost surely, 2^16663443755 is an apocalyptic number.

16663443755 is a deficient number, since it is larger than the sum of its proper divisors (6262775509).

16663443755 is a wasteful number, since it uses less digits than its factorization.

16663443755 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1531186.

The product of its digits is 5443200, while the sum is 50.

The spelling of 16663443755 in words is "sixteen billion, six hundred sixty-three million, four hundred forty-three thousand, seven hundred fifty-five".