66039899893066 has 16 divisors (see below), whose sum is σ = 108065433019680. Its totient is φ = 30018096791280.

The previous prime is 66039899893061. The next prime is 66039899893117.

66039899893066 is nontrivially palindromic in base 10.

It is a super-3 number, since 3×66039899893066³ (a number of 42 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is not an unprimeable number, because it can be changed into a prime (66039899893061) 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 7 ways as a sum of consecutive naturals, for example, 21101140 + ... + 24027856.

It is an arithmetic number, because the mean of its divisors is an integer number (6754089563730).

Almost surely, 2^{66039899893066} is an apocalyptic number.

66039899893066 is a deficient number, since it is larger than the sum of its proper divisors (42025533126614).

66039899893066 is a wasteful number, since it uses less digits than its factorization.

66039899893066 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3952389.

The product of its (nonzero) digits is 4897760256, while the sum is 82.

The spelling of 66039899893066 in words is "sixty-six trillion, thirty-nine billion, eight hundred ninety-nine million, eight hundred ninety-three thousand, sixty-six".