166666668516 has 72 divisors (see below), whose sum is σ = 440427309504. Its totient is φ = 53041728960.

The previous prime is 166666668479. The next prime is 166666668523. The reversal of 166666668516 is 615866666661.

It is a happy number.

166666668516 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 261915 + ... + 633981.

Almost surely, 2^166666668516 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 166666668516, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (220213654752).

166666668516 is an abundant number, since it is smaller than the sum of its proper divisors (273760640988).

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

166666668516 is a wasteful number, since it uses less digits than its factorization.

166666668516 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 372641 (or 372636 counting only the distinct ones).

The product of its digits is 67184640, while the sum is 63.

The spelling of 166666668516 in words is "one hundred sixty-six billion, six hundred sixty-six million, six hundred sixty-eight thousand, five hundred sixteen".