166365125313226 has 32 divisors (see below), whose sum is σ = 285645523802112. Its totient is φ = 71187317735040.

The previous prime is 166365125313221. The next prime is 166365125313227. The reversal of 166365125313226 is 622313521563661.

It is a happy number.

It is a super-2 number, since 2×166365125313226² (a number of 29 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (166365125313221) 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 15 ways as a sum of consecutive naturals, for example, 100470166 + ... + 102112606.

It is an arithmetic number, because the mean of its divisors is an integer number (8926422618816).

Almost surely, 2^{166365125313226} is an apocalyptic number.

166365125313226 is a deficient number, since it is larger than the sum of its proper divisors (119280398488886).

166365125313226 is a wasteful number, since it uses less digits than its factorization.

166365125313226 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1653814.

The product of its digits is 6998400, while the sum is 52.

Adding to 166365125313226 its reverse (622313521563661), we get a palindrome (788678646876887).

The spelling of 166365125313226 in words is "one hundred sixty-six trillion, three hundred sixty-five billion, one hundred twenty-five million, three hundred thirteen thousand, two hundred twenty-six".