16668501685 has 16 divisors (see below), whose sum is σ = 21930249600. Its totient is φ = 12061621440.

The previous prime is 16668501673. The next prime is 16668501691. The reversal of 16668501685 is 58610586661.

16668501685 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 16668501685 - 2¹⁵ = 16668468917 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 750522 + ... + 772411.

It is an arithmetic number, because the mean of its divisors is an integer number (1370640600).

Almost surely, 2^16668501685 is an apocalyptic number.

It is an amenable number.

16668501685 is a deficient number, since it is larger than the sum of its proper divisors (5261747915).

16668501685 is a wasteful number, since it uses less digits than its factorization.

16668501685 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1523148.

The product of its (nonzero) digits is 2073600, while the sum is 52.

The spelling of 16668501685 in words is "sixteen billion, six hundred sixty-eight million, five hundred one thousand, six hundred eighty-five".