66575891083427 has 16 divisors (see below), whose sum is σ = 77634433497600. Its totient is φ = 56480077262400.

The previous prime is 66575891083421. The next prime is 66575891083453. The reversal of 66575891083427 is 72438019857566.

It is not a de Polignac number, because 66575891083427 - 2⁶ = 66575891083363 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66575891083421) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3209084927 + ... + 3209105672.

It is an arithmetic number, because the mean of its divisors is an integer number (4852152093600).

It is a 1-persistent number, because it is pandigital, but 2⋅66575891083427 = 133151782166854 is not.

Almost surely, 2^{66575891083427} is an apocalyptic number.

66575891083427 is a deficient number, since it is larger than the sum of its proper divisors (11058542414173).

66575891083427 is a wasteful number, since it uses less digits than its factorization.

66575891083427 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6418190674.

The product of its (nonzero) digits is 609638400, while the sum is 71.

The spelling of 66575891083427 in words is "sixty-six trillion, five hundred seventy-five billion, eight hundred ninety-one million, eighty-three thousand, four hundred twenty-seven".