66075325065009 has 24 divisors (see below), whose sum is σ = 106590647846592. Its totient is φ = 40661738499600.

The previous prime is 66075325065007. The next prime is 66075325065019. The reversal of 66075325065009 is 90056052357066.

It is a happy number.

66075325065009 is a `hidden beast` number, since 6 + 6 + 0 + 7 + 532 + 50 + 6 + 50 + 0 + 9 = 666.

It is not a de Polignac number, because 66075325065009 - 2¹ = 66075325065007 is a prime.

It is a super-2 number, since 2×66075325065009² (a number of 28 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (54) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (66075325065007) 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, 10458262917 + ... + 10458269234.

It is an arithmetic number, because the mean of its divisors is an integer number (4441276993608).

Almost surely, 2^{66075325065009} is an apocalyptic number.

It is an amenable number.

66075325065009 is a deficient number, since it is larger than the sum of its proper divisors (40515322781583).

66075325065009 is a wasteful number, since it uses less digits than its factorization.

66075325065009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20916532179 (or 20916532167 counting only the distinct ones).

The product of its (nonzero) digits is 10206000, while the sum is 54.

The spelling of 66075325065009 in words is "sixty-six trillion, seventy-five billion, three hundred twenty-five million, sixty-five thousand, nine".