16669976378067 has 40 divisors (see below), whose sum is σ = 26244628156560. Its totient is φ = 10515581455680.

The previous prime is 16669976378057. The next prime is 16669976378089. The reversal of 16669976378067 is 76087367996661.

It is a happy number.

It is not a de Polignac number, because 16669976378067 - 2²⁶ = 16669909269203 is a prime.

It is a super-2 number, since 2×16669976378067² (a number of 27 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (81).

It is not an unprimeable number, because it can be changed into a prime (16669976378047) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 5333128 + ... + 7860165.

It is an arithmetic number, because the mean of its divisors is an integer number (656115703914).

Almost surely, 2^{16669976378067} is an apocalyptic number.

16669976378067 is a deficient number, since it is larger than the sum of its proper divisors (9574651778493).

16669976378067 is a wasteful number, since it uses less digits than its factorization.

16669976378067 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13194145 (or 13194136 counting only the distinct ones).

The product of its (nonzero) digits is 5184974592, while the sum is 81.

The spelling of 16669976378067 in words is "sixteen trillion, six hundred sixty-nine billion, nine hundred seventy-six million, three hundred seventy-eight thousand, sixty-seven".