166620326 has 16 divisors (see below), whose sum is σ = 261854208. Its totient is φ = 79365000.

The previous prime is 166620323. The next prime is 166620331. The reversal of 166620326 is 623026661.

It is a junction number, because it is equal to n+sod(n) for n = 166620292 and 166620301.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166620323) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4331 + ... + 18761.

It is an arithmetic number, because the mean of its divisors is an integer number (16365888).

Almost surely, 2^166620326 is an apocalyptic number.

166620326 is a deficient number, since it is larger than the sum of its proper divisors (95233882).

166620326 is a wasteful number, since it uses less digits than its factorization.

166620326 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14707.

The product of its (nonzero) digits is 15552, while the sum is 32.

The square root of 166620326 is about 12908.1495962822. The cubic root of 166620326 is about 550.2701989179.

Adding to 166620326 its reverse (623026661), we get a palindrome (789646987).

The spelling of 166620326 in words is "one hundred sixty-six million, six hundred twenty thousand, three hundred twenty-six".