166003222 has 16 divisors (see below), whose sum is σ = 310447872. Its totient is φ = 64676520.

The previous prime is 166003217. The next prime is 166003223. The reversal of 166003222 is 222300661.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is a junction number, because it is equal to n+sod(n) for n = 166003193 and 166003202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166003223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 538818 + ... + 539125.

It is an arithmetic number, because the mean of its divisors is an integer number (19402992).

Almost surely, 2^166003222 is an apocalyptic number.

166003222 is a deficient number, since it is larger than the sum of its proper divisors (144444650).

166003222 is a wasteful number, since it uses less digits than its factorization.

166003222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1077963.

The product of its (nonzero) digits is 864, while the sum is 22.

The square root of 166003222 is about 12884.2237639681. The cubic root of 166003222 is about 549.5900217447.

Adding to 166003222 its reverse (222300661), we get a palindrome (388303883).

It can be divided in two parts, 16600322 and 2, that multiplied together give a square (33200644 = 5762²).

The spelling of 166003222 in words is "one hundred sixty-six million, three thousand, two hundred twenty-two".