166273673643 has 96 divisors (see below), whose sum is σ = 311359426560. Its totient is φ = 86144355360.

The previous prime is 166273673603. The next prime is 166273673647. The reversal of 166273673643 is 346376372661.

166273673643 is a `hidden beast` number, since 1 + 6 + 6 + 273 + 6 + 7 + 364 + 3 = 666.

It is not a de Polignac number, because 166273673643 - 2¹⁷ = 166273542571 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 166273673643.

It is not an unprimeable number, because it can be changed into a prime (166273673647) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 7079746 + ... + 7103192.

It is an arithmetic number, because the mean of its divisors is an integer number (3243327360).

Almost surely, 2^166273673643 is an apocalyptic number.

166273673643 is a deficient number, since it is larger than the sum of its proper divisors (145085752917).

166273673643 is a wasteful number, since it uses less digits than its factorization.

166273673643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23859 (or 23847 counting only the distinct ones).

The product of its digits is 13716864, while the sum is 54.

The spelling of 166273673643 in words is "one hundred sixty-six billion, two hundred seventy-three million, six hundred seventy-three thousand, six hundred forty-three".