20016685166667 has 16 divisors (see below), whose sum is σ = 31325983479552. Its totient is φ = 11128967814240.

The previous prime is 20016685166627. The next prime is 20016685166669. The reversal of 20016685166667 is 76666158661002.

It is not a de Polignac number, because 20016685166667 - 2³⁴ = 19999505297483 is a prime.

It is a super-2 number, since 2×20016685166667² (a number of 27 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 20016685166667.

It is not an unprimeable number, because it can be changed into a prime (20016685166669) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12880749009 + ... + 12880750562.

It is an arithmetic number, because the mean of its divisors is an integer number (1957873967472).

Almost surely, 2^{20016685166667} is an apocalyptic number.

20016685166667 is a deficient number, since it is larger than the sum of its proper divisors (11309298312885).

20016685166667 is a wasteful number, since it uses less digits than its factorization.

20016685166667 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25761499618.

The product of its (nonzero) digits is 26127360, while the sum is 60.

The spelling of 20016685166667 in words is "twenty trillion, sixteen billion, six hundred eighty-five million, one hundred sixty-six thousand, six hundred sixty-seven".