6665287491797 has 16 divisors (see below), whose sum is σ = 7589622620160. Its totient is φ = 5794175943600.

The previous prime is 6665287491769. The next prime is 6665287491833. The reversal of 6665287491797 is 7971947825666.

It is not a de Polignac number, because 6665287491797 - 2¹⁰ = 6665287490773 is a prime.

It is a super-3 number, since 3×6665287491797³ (a number of 39 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6665287491727) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3071729 + ... + 4771382.

It is an arithmetic number, because the mean of its divisors is an integer number (474351413760).

Almost surely, 2^{6665287491797} is an apocalyptic number.

It is an amenable number.

6665287491797 is a deficient number, since it is larger than the sum of its proper divisors (924335128363).

6665287491797 is a wasteful number, since it uses less digits than its factorization.

6665287491797 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7846504.

The product of its digits is 1920360960, while the sum is 77.

The spelling of 6665287491797 in words is "six trillion, six hundred sixty-five billion, two hundred eighty-seven million, four hundred ninety-one thousand, seven hundred ninety-seven".