66074691544 has 16 divisors (see below), whose sum is σ = 123898712400. Its totient is φ = 33035034912.

The previous prime is 66074691541. The next prime is 66074691569. The reversal of 66074691544 is 44519647066.

It is a junction number, because it is equal to n+sod(n) for n = 66074691491 and 66074691500.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66074691541) 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, 164172 + ... + 398875.

It is an arithmetic number, because the mean of its divisors is an integer number (7743669525).

Almost surely, 2^66074691544 is an apocalyptic number.

It is an amenable number.

66074691544 is a deficient number, since it is larger than the sum of its proper divisors (57824020856).

66074691544 is a wasteful number, since it uses less digits than its factorization.

66074691544 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 577722 (or 577718 counting only the distinct ones).

The product of its (nonzero) digits is 4354560, while the sum is 52.

The spelling of 66074691544 in words is "sixty-six billion, seventy-four million, six hundred ninety-one thousand, five hundred forty-four".