66244844844265 has 16 divisors (see below), whose sum is σ = 79660258444800. Its totient is φ = 52884985499392.

The previous prime is 66244844844251. The next prime is 66244844844329. The reversal of 66244844844265 is 56244844844266.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 66244844844265 - 2⁷ = 66244844844137 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 66244844844265.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2747976 + ... + 11833894.

It is an arithmetic number, because the mean of its divisors is an integer number (4978766152800).

Almost surely, 2^{66244844844265} is an apocalyptic number.

It is an amenable number.

66244844844265 is a deficient number, since it is larger than the sum of its proper divisors (13415413600535).

66244844844265 is a wasteful number, since it uses less digits than its factorization.

66244844844265 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9088976.

The product of its digits is 1132462080, while the sum is 67.

Subtracting from 66244844844265 its reverse (56244844844266), we obtain a palindrome (9999999999999).

The spelling of 66244844844265 in words is "sixty-six trillion, two hundred forty-four billion, eight hundred forty-four million, eight hundred forty-four thousand, two hundred sixty-five".