225720066447 has 10 divisors (see below), whose sum is σ = 337186766048. Its totient is φ = 150480044244.

The previous prime is 225720066431. The next prime is 225720066503. The reversal of 225720066447 is 744660027522.

It is a happy number.

It is not a de Polignac number, because 225720066447 - 2⁴ = 225720066431 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (225720064447) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 1393333663 + ... + 1393333824.

Almost surely, 2^225720066447 is an apocalyptic number.

225720066447 is a gapful number since it is divisible by the number (27) formed by its first and last digit.

225720066447 is a deficient number, since it is larger than the sum of its proper divisors (111466699601).

225720066447 is an equidigital number, since it uses as much as digits as its factorization.

225720066447 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2786667499 (or 2786667490 counting only the distinct ones).

The product of its (nonzero) digits is 1128960, while the sum is 45.

The spelling of 225720066447 in words is "two hundred twenty-five billion, seven hundred twenty million, sixty-six thousand, four hundred forty-seven".