7868686757 has 4 divisors (see below), whose sum is σ = 7868874336. Its totient is φ = 7868499180.

The previous prime is 7868686729. The next prime is 7868686769. The reversal of 7868686757 is 7576868687.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 7576868687 = 877 ⋅8639531.

It is a cyclic number.

It is not a de Polignac number, because 7868686757 - 2²² = 7864492453 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 (7868686457) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1208 + ... + 125454.

It is an arithmetic number, because the mean of its divisors is an integer number (1967218584).

Almost surely, 2^7868686757 is an apocalyptic number.

It is an amenable number.

7868686757 is a deficient number, since it is larger than the sum of its proper divisors (187579).

7868686757 is a wasteful number, since it uses less digits than its factorization.

7868686757 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 187578.

The product of its digits is 189665280, while the sum is 68.

The square root of 7868686757 is about 88705.6185199111. The cubic root of 7868686757 is about 1988.9968056200.

The spelling of 7868686757 in words is "seven billion, eight hundred sixty-eight million, six hundred eighty-six thousand, seven hundred fifty-seven".