66102043665 has 16 divisors (see below), whose sum is σ = 120872308608. Its totient is φ = 30218077056.

The previous prime is 66102043571. The next prime is 66102043703. The reversal of 66102043665 is 56634020166.

It is not a de Polignac number, because 66102043665 - 2¹¹ = 66102041617 is a prime.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 314771532 + ... + 314771741.

It is an arithmetic number, because the mean of its divisors is an integer number (7554519288).

Almost surely, 2^66102043665 is an apocalyptic number.

It is an amenable number.

66102043665 is a deficient number, since it is larger than the sum of its proper divisors (54770264943).

66102043665 is a wasteful number, since it uses less digits than its factorization.

66102043665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 629543288.

The product of its (nonzero) digits is 155520, while the sum is 39.

The spelling of 66102043665 in words is "sixty-six billion, one hundred two million, forty-three thousand, six hundred sixty-five".