36660681845 has 4 divisors (see below), whose sum is σ = 43992818220. Its totient is φ = 29328545472.

The previous prime is 36660681817. The next prime is 36660681961. The reversal of 36660681845 is 54818606663.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 3940575076 + 32720106769 = 62774^2 + 180887^2 .

It is a cyclic number.

It is not a de Polignac number, because 36660681845 - 2¹² = 36660677749 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3666068180 + ... + 3666068189.

It is an arithmetic number, because the mean of its divisors is an integer number (10998204555).

Almost surely, 2^36660681845 is an apocalyptic number.

It is an amenable number.

36660681845 is a deficient number, since it is larger than the sum of its proper divisors (7332136375).

36660681845 is an equidigital number, since it uses as much as digits as its factorization.

36660681845 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7332136374.

The product of its (nonzero) digits is 4976640, while the sum is 53.

The spelling of 36660681845 in words is "thirty-six billion, six hundred sixty million, six hundred eighty-one thousand, eight hundred forty-five".