36665566556663 has 128 divisors (see below), whose sum is σ = 45286678609920. Its totient is φ = 29286541025280.

The previous prime is 36665566556611. The next prime is 36665566556677.

36665566556663 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 36665566556663 - 2¹⁴ = 36665566540279 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (36665566556363) by changing a digit.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 29640716081 + ... + 29640717317.

It is an arithmetic number, because the mean of its divisors is an integer number (353802176640).

Almost surely, 2^{36665566556663} is an apocalyptic number.

36665566556663 is a deficient number, since it is larger than the sum of its proper divisors (8621112053257).

36665566556663 is a wasteful number, since it uses less digits than its factorization.

36665566556663 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2269.

The product of its digits is 9447840000, while the sum is 74.

The spelling of 36665566556663 in words is "thirty-six trillion, six hundred sixty-five billion, five hundred sixty-six million, five hundred fifty-six thousand, six hundred sixty-three".