66044566324439 has 4 divisors (see below), whose sum is σ = 66049200719880. Its totient is φ = 66039931929000.

The previous prime is 66044566324421. The next prime is 66044566324489. The reversal of 66044566324439 is 93442366544066.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-66044566324439 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 (66044566324489) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2317176344 + ... + 2317204845.

It is an arithmetic number, because the mean of its divisors is an integer number (16512300179970).

Almost surely, 2^{66044566324439} is an apocalyptic number.

66044566324439 is a deficient number, since it is larger than the sum of its proper divisors (4634395441).

66044566324439 is a wasteful number, since it uses less digits than its factorization.

66044566324439 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4634395440.

The product of its (nonzero) digits is 268738560, while the sum is 62.

The spelling of 66044566324439 in words is "sixty-six trillion, forty-four billion, five hundred sixty-six million, three hundred twenty-four thousand, four hundred thirty-nine".