66448093569 has 64 divisors (see below), whose sum is σ = 106902464256. Its totient is φ = 36172800000.

The previous prime is 66448093553. The next prime is 66448093589. The reversal of 66448093569 is 96539084466.

It is not a de Polignac number, because 66448093569 - 2⁴ = 66448093553 is a prime.

It is a super-2 number, since 2×66448093569² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (66448093519) by changing a digit.

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 63 ways as a sum of consecutive naturals, for example, 7048479 + ... + 7057899.

It is an arithmetic number, because the mean of its divisors is an integer number (1670351004).

Almost surely, 2^66448093569 is an apocalyptic number.

It is an amenable number.

66448093569 is a deficient number, since it is larger than the sum of its proper divisors (40454370687).

66448093569 is a wasteful number, since it uses less digits than its factorization.

66448093569 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9890.

The product of its (nonzero) digits is 33592320, while the sum is 60.

The spelling of 66448093569 in words is "sixty-six billion, four hundred forty-eight million, ninety-three thousand, five hundred sixty-nine".