166402 has 16 divisors (see below), whose sum is σ = 273600. Its totient is φ = 75600.

The previous prime is 166399. The next prime is 166403. The reversal of 166402 is 204661.

It is a Harshad number since it is a multiple of its sum of digits (19).

It is an Ulam number.

It is a self number, because there is not a number n which added to its sum of digits gives 166402.

It is not an unprimeable number, because it can be changed into a prime (166403) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1027 + ... + 1177.

It is an arithmetic number, because the mean of its divisors is an integer number (17100).

2¹⁶⁶⁴⁰² is an apocalyptic number.

166402 is a deficient number, since it is larger than the sum of its proper divisors (107198).

166402 is a wasteful number, since it uses less digits than its factorization.

166402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 201.

The product of its (nonzero) digits is 288, while the sum is 19.

The square root of 166402 is about 407.9240125317. The cubic root of 166402 is about 55.0029750457.

The spelling of 166402 in words is "one hundred sixty-six thousand, four hundred two".