166622413225625 has 40 divisors (see below), whose sum is σ = 238637672750400. Its totient is φ = 113927988744000.

The previous prime is 166622413225591. The next prime is 166622413225627. The reversal of 166622413225625 is 526522314226661.

It is not a de Polignac number, because 166622413225625 - 2¹² = 166622413221529 is a prime.

It is not an unprimeable number, because it can be changed into a prime (166622413225627) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 53036339 + ... + 56090088.

It is an arithmetic number, because the mean of its divisors is an integer number (5965941818760).

Almost surely, 2^{166622413225625} is an apocalyptic number.

It is an amenable number.

166622413225625 is a deficient number, since it is larger than the sum of its proper divisors (72015259524775).

166622413225625 is an equidigital number, since it uses as much as digits as its factorization.

166622413225625 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 109126803 (or 109126788 counting only the distinct ones).

The product of its digits is 12441600, while the sum is 53.

The spelling of 166622413225625 in words is "one hundred sixty-six trillion, six hundred twenty-two billion, four hundred thirteen million, two hundred twenty-five thousand, six hundred twenty-five".