225667766523 has 16 divisors (see below), whose sum is σ = 302505536000. Its totient is φ = 149638104000.

The previous prime is 225667766507. The next prime is 225667766531. The reversal of 225667766523 is 325667766522.

It is a happy number.

It is not a de Polignac number, because 225667766523 - 2⁴ = 225667766507 is a prime.

It is a Smith number, since the sum of its digits (57) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (225667766923) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1728618 + ... + 1854576.

It is an arithmetic number, because the mean of its divisors is an integer number (18906596000).

Almost surely, 2^225667766523 is an apocalyptic number.

225667766523 is a deficient number, since it is larger than the sum of its proper divisors (76837769477).

225667766523 is a wasteful number, since it uses less digits than its factorization.

225667766523 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 129162.

The product of its digits is 38102400, while the sum is 57.

Subtracting 225667766523 from its reverse (325667766522), we obtain a palindrome (99999999999).

The spelling of 225667766523 in words is "two hundred twenty-five billion, six hundred sixty-seven million, seven hundred sixty-six thousand, five hundred twenty-three".