66497811344 has 40 divisors (see below), whose sum is σ = 130101940800. Its totient is φ = 32924707200.

The previous prime is 66497811343. The next prime is 66497811361. The reversal of 66497811344 is 44311879466.

66497811344 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (66497811343) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 622334 + ... + 721314.

It is an arithmetic number, because the mean of its divisors is an integer number (3252548520).

Almost surely, 2^66497811344 is an apocalyptic number.

It is an amenable number.

66497811344 is a deficient number, since it is larger than the sum of its proper divisors (63604129456).

66497811344 is a wasteful number, since it uses less digits than its factorization.

66497811344 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 99399 (or 99393 counting only the distinct ones).

The product of its digits is 3483648, while the sum is 53.

The spelling of 66497811344 in words is "sixty-six billion, four hundred ninety-seven million, eight hundred eleven thousand, three hundred forty-four".