166611155994 has 24 divisors (see below), whose sum is σ = 361000991520. Its totient is φ = 55535489928.

The previous prime is 166611155993. The next prime is 166611156037. The reversal of 166611155994 is 499551116661.

166611155994 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 166611155994.

It is not an unprimeable number, because it can be changed into a prime (166611155993) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 655837 + ... + 873695.

It is an arithmetic number, because the mean of its divisors is an integer number (15041707980).

Almost surely, 2^166611155994 is an apocalyptic number.

166611155994 is an abundant number, since it is smaller than the sum of its proper divisors (194389835526).

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

166611155994 is a wasteful number, since it uses less digits than its factorization.

166611155994 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 260354 (or 260351 counting only the distinct ones).

The product of its digits is 1749600, while the sum is 54.

The spelling of 166611155994 in words is "one hundred sixty-six billion, six hundred eleven million, one hundred fifty-five thousand, nine hundred ninety-four".