78663663407 has 8 divisors (see below), whose sum is σ = 89917769856. Its totient is φ = 67413667032.

The previous prime is 78663663401. The next prime is 78663663439. The reversal of 78663663407 is 70436636687.

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 78663663407 - 2³⁶ = 9944186671 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 (78663663401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 986393 + ... + 1063154.

It is an arithmetic number, because the mean of its divisors is an integer number (11239721232).

Almost surely, 2^78663663407 is an apocalyptic number.

78663663407 is a deficient number, since it is larger than the sum of its proper divisors (11254106449).

78663663407 is a wasteful number, since it uses less digits than its factorization.

78663663407 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2055037.

The product of its (nonzero) digits is 18289152, while the sum is 56.

The spelling of 78663663407 in words is "seventy-eight billion, six hundred sixty-three million, six hundred sixty-three thousand, four hundred seven".