78876685668427 has 4 divisors (see below), whose sum is σ = 78876795011616. Its totient is φ = 78876576325240.

The previous prime is 78876685668421. The next prime is 78876685668433. The reversal of 78876685668427 is 72486658667887.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (78876685668421) and next prime (78876685668433).

It is a cyclic number.

It is not a de Polignac number, because 78876685668427 - 2²³ = 78876677279819 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (78876685668421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 53582308 + ... + 55034689.

It is an arithmetic number, because the mean of its divisors is an integer number (19719198752904).

Almost surely, 2^{78876685668427} is an apocalyptic number.

78876685668427 is a deficient number, since it is larger than the sum of its proper divisors (109343189).

78876685668427 is a wasteful number, since it uses less digits than its factorization.

78876685668427 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 109343188.

The product of its digits is 72831467520, while the sum is 88.

The spelling of 78876685668427 in words is "seventy-eight trillion, eight hundred seventy-six billion, six hundred eighty-five million, six hundred sixty-eight thousand, four hundred twenty-seven".