66041144364431 has 4 divisors (see below), whose sum is σ = 66042903201000. Its totient is φ = 66039385527864.

The previous prime is 66041144364407. The next prime is 66041144364511. The reversal of 66041144364431 is 13446344114066.

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

It is a cyclic number.

It is not a de Polignac number, because 66041144364431 - 2¹⁰ = 66041144363407 is a prime.

It is a super-2 number, since 2×66041144364431² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66041144364131) 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, 879361961 + ... + 879437058.

It is an arithmetic number, because the mean of its divisors is an integer number (16510725800250).

Almost surely, 2^{66041144364431} is an apocalyptic number.

66041144364431 is a deficient number, since it is larger than the sum of its proper divisors (1758836569).

66041144364431 is a wasteful number, since it uses less digits than its factorization.

66041144364431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1758836568.

The product of its (nonzero) digits is 1990656, while the sum is 47.

Adding to 66041144364431 its reverse (13446344114066), we get a palindrome (79487488478497).

The spelling of 66041144364431 in words is "sixty-six trillion, forty-one billion, one hundred forty-four million, three hundred sixty-four thousand, four hundred thirty-one".