16866021534 has 16 divisors (see below), whose sum is σ = 34449746688. Its totient is φ = 5502389912.

The previous prime is 16866021433. The next prime is 16866021553. The reversal of 16866021534 is 43512066861.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 29904012 + ... + 29904575.

It is an arithmetic number, because the mean of its divisors is an integer number (2153109168).

Almost surely, 2^16866021534 is an apocalyptic number.

16866021534 is an abundant number, since it is smaller than the sum of its proper divisors (17583725154).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

16866021534 is a wasteful number, since it uses less digits than its factorization.

16866021534 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 59808639.

The product of its (nonzero) digits is 207360, while the sum is 42.

The spelling of 16866021534 in words is "sixteen billion, eight hundred sixty-six million, twenty-one thousand, five hundred thirty-four".