78336663387 has 8 divisors (see below), whose sum is σ = 104450630736. Its totient is φ = 52223569152.

The previous prime is 78336663373. The next prime is 78336663437.

78336663387 is nontrivially palindromic in base 10.

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

It is not a de Polignac number, because 78336663387 - 2⁸ = 78336663131 is a prime.

It is a super-2 number, since 2×78336663387² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 78336663387.

It is not an unprimeable number, because it can be changed into a prime (78336663347) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 32103 + ... + 397119.

It is an arithmetic number, because the mean of its divisors is an integer number (13056328842).

Almost surely, 2^78336663387 is an apocalyptic number.

78336663387 is a deficient number, since it is larger than the sum of its proper divisors (26113967349).

78336663387 is a wasteful number, since it uses less digits than its factorization.

78336663387 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 436557.

The product of its digits is 54867456, while the sum is 60.

The spelling of 78336663387 in words is "seventy-eight billion, three hundred thirty-six million, six hundred sixty-three thousand, three hundred eighty-seven".