66066065999969 has 16 divisors (see below), whose sum is σ = 75794395438080. Its totient is φ = 56410334932560.

The previous prime is 66066065999953. The next prime is 66066066000017. The reversal of 66066065999969 is 96999956066066.

It is not a de Polignac number, because 66066065999969 - 2⁴ = 66066065999953 is a prime.

It is a super-2 number, since 2×66066065999969² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66066065999069) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 43097474 + ... + 44604084.

It is an arithmetic number, because the mean of its divisors is an integer number (4737149714880).

Almost surely, 2^{66066065999969} is an apocalyptic number.

It is an amenable number.

66066065999969 is a deficient number, since it is larger than the sum of its proper divisors (9728329438111).

66066065999969 is a wasteful number, since it uses less digits than its factorization.

66066065999969 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1530700.

The product of its (nonzero) digits is 13774950720, while the sum is 86.

The spelling of 66066065999969 in words is "sixty-six trillion, sixty-six billion, sixty-five million, nine hundred ninety-nine thousand, nine hundred sixty-nine".