66365044533 has 24 divisors (see below), whose sum is σ = 101608954200. Its totient is φ = 41595899904.

The previous prime is 66365044453. The next prime is 66365044541. The reversal of 66365044533 is 33544056366.

66365044533 is a `hidden beast` number, since 6 + 63 + 6 + 50 + 4 + 4 + 533 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 14443953489 + 51921091044 = 120183^2 + 227862^2 .

It is not a de Polignac number, because 66365044533 - 2⁹ = 66365044021 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66365044033) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 91318 + ... + 375591.

It is an arithmetic number, because the mean of its divisors is an integer number (4233706425).

Almost surely, 2^66365044533 is an apocalyptic number.

It is an amenable number.

66365044533 is a deficient number, since it is larger than the sum of its proper divisors (35243909667).

66365044533 is a wasteful number, since it uses less digits than its factorization.

66365044533 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 467861 (or 467858 counting only the distinct ones).

The product of its (nonzero) digits is 2332800, while the sum is 45.

The spelling of 66365044533 in words is "sixty-six billion, three hundred sixty-five million, forty-four thousand, five hundred thirty-three".