6665120707 has 8 divisors (see below), whose sum is σ = 7621099776. Its totient is φ = 5710096392.

The previous prime is 6665120699. The next prime is 6665120723. The reversal of 6665120707 is 7070215666.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 6665120707 - 2³ = 6665120699 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 6665120707.

It is not an unprimeable number, because it can be changed into a prime (6665120107) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 223663 + ... + 251704.

It is an arithmetic number, because the mean of its divisors is an integer number (952637472).

Almost surely, 2^6665120707 is an apocalyptic number.

6665120707 is a deficient number, since it is larger than the sum of its proper divisors (955979069).

6665120707 is a wasteful number, since it uses less digits than its factorization.

6665120707 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 477377.

The product of its (nonzero) digits is 105840, while the sum is 40.

The square root of 6665120707 is about 81640.1905130065. The cubic root of 6665120707 is about 1881.9265661407.

The spelling of 6665120707 in words is "six billion, six hundred sixty-five million, one hundred twenty thousand, seven hundred seven".