66736736737005 has 32 divisors (see below), whose sum is σ = 111432054988800. Its totient is φ = 34042131984960.

The previous prime is 66736736736991. The next prime is 66736736737067. The reversal of 66736736737005 is 50073763763766.

It is a happy number.

It is not a de Polignac number, because 66736736737005 - 2¹⁸ = 66736736474861 is a prime.

It is a Smith number, since the sum of its digits (66) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 5713231 + ... + 12888540.

It is an arithmetic number, because the mean of its divisors is an integer number (3482251718400).

Almost surely, 2^{66736736737005} is an apocalyptic number.

It is an amenable number.

66736736737005 is a deficient number, since it is larger than the sum of its proper divisors (44695318251795).

66736736737005 is a wasteful number, since it uses less digits than its factorization.

66736736737005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18612201.

The product of its (nonzero) digits is 420078960, while the sum is 66.

The spelling of 66736736737005 in words is "sixty-six trillion, seven hundred thirty-six billion, seven hundred thirty-six million, seven hundred thirty-seven thousand, five".