66244461225 has 24 divisors (see below), whose sum is σ = 109714064160. Its totient is φ = 35269125120.

The previous prime is 66244461209. The next prime is 66244461263. The reversal of 66244461225 is 52216444266.

It is not a de Polignac number, because 66244461225 - 2⁴ = 66244461209 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 722115 + ... + 808664.

It is an arithmetic number, because the mean of its divisors is an integer number (4571419340).

Almost surely, 2^66244461225 is an apocalyptic number.

It is an amenable number.

66244461225 is a deficient number, since it is larger than the sum of its proper divisors (43469602935).

66244461225 is a wasteful number, since it uses less digits than its factorization.

66244461225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1531369 (or 1531364 counting only the distinct ones).

The product of its digits is 552960, while the sum is 42.

The spelling of 66244461225 in words is "sixty-six billion, two hundred forty-four million, four hundred sixty-one thousand, two hundred twenty-five".