6665602111087 has 4 divisors (see below), whose sum is σ = 6685381346176. Its totient is φ = 6645822876000.

The previous prime is 6665602111081. The next prime is 6665602111121. The reversal of 6665602111087 is 7801112065666.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6665602111087 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 6665602111087.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6665602111081) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9889617039 + ... + 9889617712.

It is an arithmetic number, because the mean of its divisors is an integer number (1671345336544).

Almost surely, 2^{6665602111087} is an apocalyptic number.

6665602111087 is a deficient number, since it is larger than the sum of its proper divisors (19779235089).

6665602111087 is a wasteful number, since it uses less digits than its factorization.

6665602111087 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19779235088.

The product of its (nonzero) digits is 725760, while the sum is 49.

The spelling of 6665602111087 in words is "six trillion, six hundred sixty-five billion, six hundred two million, one hundred eleven thousand, eighty-seven".