166640022 has 24 divisors (see below), whose sum is σ = 362340264. Its totient is φ = 55348704.

The previous prime is 166640017. The next prime is 166640027. The reversal of 166640022 is 220046661.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (166640017) and next prime (166640027).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166640027) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 11263 + ... + 21450.

It is an arithmetic number, because the mean of its divisors is an integer number (15097511).

Almost surely, 2^166640022 is an apocalyptic number.

166640022 is an abundant number, since it is smaller than the sum of its proper divisors (195700242).

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

166640022 is a wasteful number, since it uses less digits than its factorization.

166640022 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33004 (or 33001 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 27.

The square root of 166640022 is about 12908.9125026084. The cubic root of 166640022 is about 550.2918803359.

Adding to 166640022 its reverse (220046661), we get a palindrome (386686683).

The spelling of 166640022 in words is "one hundred sixty-six million, six hundred forty thousand, twenty-two".