7879684165 has 4 divisors (see below), whose sum is σ = 9455621004. Its totient is φ = 6303747328.

The previous prime is 7879684133. The next prime is 7879684207. The reversal of 7879684165 is 5614869787.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5614869787 = 137 ⋅40984451.

It can be written as a sum of positive squares in 2 ways, for example, as 1309933249 + 6569750916 = 36193^2 + 81054^2 .

It is a cyclic number.

It is not a de Polignac number, because 7879684165 - 2⁵ = 7879684133 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 787968412 + ... + 787968421.

It is an arithmetic number, because the mean of its divisors is an integer number (2363905251).

Almost surely, 2^7879684165 is an apocalyptic number.

It is an amenable number.

7879684165 is a deficient number, since it is larger than the sum of its proper divisors (1575936839).

7879684165 is a wasteful number, since it uses less digits than its factorization.

7879684165 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1575936838.

The product of its digits is 20321280, while the sum is 61.

The square root of 7879684165 is about 88767.5851028967. The cubic root of 7879684165 is about 1989.9229926515.

The spelling of 7879684165 in words is "seven billion, eight hundred seventy-nine million, six hundred eighty-four thousand, one hundred sixty-five".