66075253258161 has 32 divisors (see below), whose sum is σ = 103650130425600. Its totient is φ = 37423152221952.

The previous prime is 66075253258097. The next prime is 66075253258169. The reversal of 66075253258161 is 16185235257066.

It is not a de Polignac number, because 66075253258161 - 2⁶ = 66075253258097 is a prime.

It is a super-2 number, since 2×66075253258161² (a number of 28 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (66075253258169) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 284012370 + ... + 284244923.

It is an arithmetic number, because the mean of its divisors is an integer number (3239066575800).

Almost surely, 2^{66075253258161} is an apocalyptic number.

It is an amenable number.

66075253258161 is a deficient number, since it is larger than the sum of its proper divisors (37574877167439).

66075253258161 is a wasteful number, since it uses less digits than its factorization.

66075253258161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 568257430 (or 568257416 counting only the distinct ones).

The product of its (nonzero) digits is 18144000, while the sum is 57.

The spelling of 66075253258161 in words is "sixty-six trillion, seventy-five billion, two hundred fifty-three million, two hundred fifty-eight thousand, one hundred sixty-one".