166116728068 has 12 divisors (see below), whose sum is σ = 290871261772. Its totient is φ = 83010653280.

The previous prime is 166116728059. The next prime is 166116728081. The reversal of 166116728068 is 860827611661.

It can be written as a sum of positive squares in 2 ways, for example, as 70257924 + 166046470144 = 8382^2 + 407488^2 .

It is a hoax number, since the sum of its digits (52) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11919855 + ... + 11933782.

Almost surely, 2^166116728068 is an apocalyptic number.

It is an amenable number.

166116728068 is a deficient number, since it is larger than the sum of its proper divisors (124754533704).

166116728068 is a wasteful number, since it uses less digits than its factorization.

166116728068 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23855382 (or 23855380 counting only the distinct ones).

The product of its (nonzero) digits is 1161216, while the sum is 52.

The spelling of 166116728068 in words is "one hundred sixty-six billion, one hundred sixteen million, seven hundred twenty-eight thousand, sixty-eight".