78660558415 has 8 divisors (see below), whose sum is σ = 94396682160. Its totient is φ = 62925772032.

The previous prime is 78660558401. The next prime is 78660558433. The reversal of 78660558415 is 51485506687.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 78660558415 - 2²⁹ = 78123687503 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 200034 + ... + 444223.

It is an arithmetic number, because the mean of its divisors is an integer number (11799585270).

Almost surely, 2^78660558415 is an apocalyptic number.

78660558415 is a deficient number, since it is larger than the sum of its proper divisors (15736123745).

78660558415 is a wasteful number, since it uses less digits than its factorization.

78660558415 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 668681.

The product of its (nonzero) digits is 8064000, while the sum is 55.

The spelling of 78660558415 in words is "seventy-eight billion, six hundred sixty million, five hundred fifty-eight thousand, four hundred fifteen".