8378065761 has 16 divisors (see below), whose sum is σ = 12031872384. Its totient is φ = 5154948864.

The previous prime is 8378065757. The next prime is 8378065769. The reversal of 8378065761 is 1675608738.

It is not a de Polignac number, because 8378065761 - 2² = 8378065757 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (8378065769) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 344185 + ... + 367721.

It is an arithmetic number, because the mean of its divisors is an integer number (751992024).

Almost surely, 2^8378065761 is an apocalyptic number.

It is an amenable number.

8378065761 is a deficient number, since it is larger than the sum of its proper divisors (3653806623).

8378065761 is a wasteful number, since it uses less digits than its factorization.

8378065761 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32680.

The product of its (nonzero) digits is 1693440, while the sum is 51.

The square root of 8378065761 is about 91531.7745976773. The cubic root of 8378065761 is about 2031.0218157295.

The spelling of 8378065761 in words is "eight billion, three hundred seventy-eight million, sixty-five thousand, seven hundred sixty-one".