78663614 has 4 divisors (see below), whose sum is σ = 117995424. Its totient is φ = 39331806.

The previous prime is 78663593. The next prime is 78663617. The reversal of 78663614 is 41636687.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 41636687 = 337 ⋅123551.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78663617) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19665902 + ... + 19665905.

It is an arithmetic number, because the mean of its divisors is an integer number (29498856).

Almost surely, 2^78663614 is an apocalyptic number.

78663614 is a deficient number, since it is larger than the sum of its proper divisors (39331810).

78663614 is a wasteful number, since it uses less digits than its factorization.

78663614 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39331809.

The product of its digits is 145152, while the sum is 41.

The square root of 78663614 is about 8869.2510394058. The cubic root of 78663614 is about 428.4741557120.

The spelling of 78663614 in words is "seventy-eight million, six hundred sixty-three thousand, six hundred fourteen".