16668501669 has 12 divisors (see below), whose sum is σ = 24436079616. Its totient is φ = 10946478312.

The previous prime is 16668501667. The next prime is 16668501673. The reversal of 16668501669 is 96610586661.

It is not a de Polignac number, because 16668501669 - 2¹ = 16668501667 is a prime.

It is a super-2 number, since 2×16668501669² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16668501667) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 13820709 + ... + 13821914.

It is an arithmetic number, because the mean of its divisors is an integer number (2036339968).

Almost surely, 2^16668501669 is an apocalyptic number.

It is an amenable number.

16668501669 is a deficient number, since it is larger than the sum of its proper divisors (7767577947).

16668501669 is a wasteful number, since it uses less digits than its factorization.

16668501669 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27642696 (or 27642693 counting only the distinct ones).

The product of its (nonzero) digits is 2799360, while the sum is 54.

The spelling of 16668501669 in words is "sixteen billion, six hundred sixty-eight million, five hundred one thousand, six hundred sixty-nine".