7665880109 has 8 divisors (see below), whose sum is σ = 7737907320. Its totient is φ = 7594187776.

The previous prime is 7665880081. The next prime is 7665880141. The reversal of 7665880109 is 9010885667.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 363664900 + 7302215209 = 19070^2 + 85453^2 .

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-7665880109 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7665850109) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 37604 + ... + 129405.

It is an arithmetic number, because the mean of its divisors is an integer number (967238415).

Almost surely, 2^7665880109 is an apocalyptic number.

It is an amenable number.

7665880109 is a deficient number, since it is larger than the sum of its proper divisors (72027211).

7665880109 is a wasteful number, since it uses less digits than its factorization.

7665880109 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 167439.

The product of its (nonzero) digits is 725760, while the sum is 50.

The square root of 7665880109 is about 87555.0119010899. The cubic root of 7665880109 is about 1971.7597980653.

The spelling of 7665880109 in words is "seven billion, six hundred sixty-five million, eight hundred eighty thousand, one hundred nine".