166266117616 has 40 divisors (see below), whose sum is σ = 324397317600. Its totient is φ = 82551009024.

The previous prime is 166266117613. The next prime is 166266117617. The reversal of 166266117616 is 616711662661.

It is a hoax number, since the sum of its digits (49) coincides with the sum of the digits of its distinct prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 166266117616.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166266117613) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10379085 + ... + 10395091.

It is an arithmetic number, because the mean of its divisors is an integer number (8109932940).

Almost surely, 2^166266117616 is an apocalyptic number.

166266117616 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

166266117616 is a deficient number, since it is larger than the sum of its proper divisors (158131199984).

166266117616 is a wasteful number, since it uses less digits than its factorization.

166266117616 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20521 (or 20515 counting only the distinct ones).

The product of its digits is 653184, while the sum is 49.

The spelling of 166266117616 in words is "one hundred sixty-six billion, two hundred sixty-six million, one hundred seventeen thousand, six hundred sixteen".