66244042020004 has 6 divisors (see below), whose sum is σ = 115927073535014. Its totient is φ = 33122021010000.

The previous prime is 66244042020001. The next prime is 66244042020007. The reversal of 66244042020004 is 40002024044266.

It is an interprime number because it is at equal distance from previous prime (66244042020001) and next prime (66244042020007).

It can be written as a sum of positive squares in only one way, i.e., 61486801187904 + 4757240832100 = 7841352^2 + 2181110^2 .

It is not an unprimeable number, because it can be changed into a prime (66244042020001) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8280505252497 + ... + 8280505252504.

Almost surely, 2^{66244042020004} is an apocalyptic number.

It is an amenable number.

66244042020004 is a deficient number, since it is larger than the sum of its proper divisors (49683031515010).

66244042020004 is a wasteful number, since it uses less digits than its factorization.

66244042020004 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16561010505005 (or 16561010505003 counting only the distinct ones).

The product of its (nonzero) digits is 73728, while the sum is 34.

The spelling of 66244042020004 in words is "sixty-six trillion, two hundred forty-four billion, forty-two million, twenty thousand, four".