66544757840133 has 24 divisors (see below), whose sum is σ = 96143641321728. Its totient is φ = 44352356866272.

The previous prime is 66544757840131. The next prime is 66544757840147. The reversal of 66544757840133 is 33104875744566.

66544757840133 is a `hidden beast` number, since 6 + 6 + 5 + 4 + 4 + 7 + 578 + 40 + 13 + 3 = 666.

It is not a de Polignac number, because 66544757840133 - 2¹ = 66544757840131 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66544757840131) 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, 683001060 + ... + 683098482.

It is an arithmetic number, because the mean of its divisors is an integer number (4005985055072).

Almost surely, 2^{66544757840133} is an apocalyptic number.

It is an amenable number.

66544757840133 is a deficient number, since it is larger than the sum of its proper divisors (29598883481595).

66544757840133 is a wasteful number, since it uses less digits than its factorization.

66544757840133 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 115153 (or 115150 counting only the distinct ones).

The product of its (nonzero) digits is 203212800, while the sum is 63.

The spelling of 66544757840133 in words is "sixty-six trillion, five hundred forty-four billion, seven hundred fifty-seven million, eight hundred forty thousand, one hundred thirty-three".