7965807678 has 64 divisors (see below), whose sum is σ = 18307123200. Its totient is φ = 2564792640.

The previous prime is 7965807677. The next prime is 7965807679. The reversal of 7965807678 is 8767085697.

It is an interprime number because it is at equal distance from previous prime (7965807677) and next prime (7965807679).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7965807677) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 948325 + ... + 956687.

It is an arithmetic number, because the mean of its divisors is an integer number (286048800).

Almost surely, 2^7965807678 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 7965807678, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (9153561600).

7965807678 is an abundant number, since it is smaller than the sum of its proper divisors (10341315522).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

7965807678 is a wasteful number, since it uses less digits than its factorization.

7965807678 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8974 (or 8968 counting only the distinct ones).

The product of its (nonzero) digits is 35562240, while the sum is 63.

The square root of 7965807678 is about 89251.3735356493. The cubic root of 7965807678 is about 1997.1465707401.

The spelling of 7965807678 in words is "seven billion, nine hundred sixty-five million, eight hundred seven thousand, six hundred seventy-eight".