66075506757801 has 48 divisors (see below), whose sum is σ = 100431669811200. Its totient is φ = 41804676740736.

The previous prime is 66075506757773. The next prime is 66075506757863. The reversal of 66075506757801 is 10875760557066.

66075506757801 is a `hidden beast` number, since 6 + 6 + 0 + 7 + 5 + 50 + 6 + 7 + 578 + 0 + 1 = 666.

It is not a de Polignac number, because 66075506757801 - 2⁹ = 66075506757289 is a prime.

It is not an unprimeable number, because it can be changed into a prime (66075506757101) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 2587150 + ... + 11783223.

It is an arithmetic number, because the mean of its divisors is an integer number (2092326454400).

Almost surely, 2^{66075506757801} is an apocalyptic number.

It is an amenable number.

66075506757801 is a deficient number, since it is larger than the sum of its proper divisors (34356163053399).

66075506757801 is a wasteful number, since it uses less digits than its factorization.

66075506757801 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14370710 (or 14370707 counting only the distinct ones).

The product of its (nonzero) digits is 74088000, while the sum is 63.

The spelling of 66075506757801 in words is "sixty-six trillion, seventy-five billion, five hundred six million, seven hundred fifty-seven thousand, eight hundred one".