7665311813 has 16 divisors (see below), whose sum is σ = 8307663360. Its totient is φ = 7055294400.

The previous prime is 7665311791. The next prime is 7665311837. The reversal of 7665311813 is 3181135667.

7665311813 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 7665311813 - 2⁸ = 7665311557 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7665313813) 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, 3398 + ... + 123863.

It is an arithmetic number, because the mean of its divisors is an integer number (519228960).

Almost surely, 2^7665311813 is an apocalyptic number.

It is an amenable number.

7665311813 is a deficient number, since it is larger than the sum of its proper divisors (642351547).

7665311813 is a wasteful number, since it uses less digits than its factorization.

7665311813 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 127388.

The product of its digits is 90720, while the sum is 41.

The square root of 7665311813 is about 87551.7664756114. The cubic root of 7665311813 is about 1971.7110725925.

The spelling of 7665311813 in words is "seven billion, six hundred sixty-five million, three hundred eleven thousand, eight hundred thirteen".