66424602225 has 48 divisors (see below), whose sum is σ = 114671142720. Its totient is φ = 33885062400.

The previous prime is 66424602217. The next prime is 66424602227. The reversal of 66424602225 is 52220642466.

It is not a de Polignac number, because 66424602225 - 2³ = 66424602217 is a prime.

It is not an unprimeable number, because it can be changed into a prime (66424602227) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 90015 + ... + 375435.

It is an arithmetic number, because the mean of its divisors is an integer number (2388982140).

Almost surely, 2^66424602225 is an apocalyptic number.

It is an amenable number.

66424602225 is a deficient number, since it is larger than the sum of its proper divisors (48246540495).

66424602225 is a wasteful number, since it uses less digits than its factorization.

66424602225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 285570 (or 285565 counting only the distinct ones).

The product of its (nonzero) digits is 276480, while the sum is 39.

The spelling of 66424602225 in words is "sixty-six billion, four hundred twenty-four million, six hundred two thousand, two hundred twenty-five".