16665434287 has 16 divisors (see below), whose sum is σ = 17156532960. Its totient is φ = 16178572800.

The previous prime is 16665434267. The next prime is 16665434293. The reversal of 16665434287 is 78243456661.

It is a cyclic number.

It is not a de Polignac number, because 16665434287 - 2³¹ = 14517950639 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 (16665434267) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14231212 + ... + 14232382.

It is an arithmetic number, because the mean of its divisors is an integer number (1072283310).

Almost surely, 2^16665434287 is an apocalyptic number.

16665434287 is a deficient number, since it is larger than the sum of its proper divisors (491098673).

16665434287 is a wasteful number, since it uses less digits than its factorization.

16665434287 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2634.

The product of its digits is 5806080, while the sum is 52.

The spelling of 16665434287 in words is "sixteen billion, six hundred sixty-five million, four hundred thirty-four thousand, two hundred eighty-seven".