78662083678 has 4 divisors (see below), whose sum is σ = 117993125520. Its totient is φ = 39331041838.

The previous prime is 78662083631. The next prime is 78662083691. The reversal of 78662083678 is 87638026687.

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

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19665520918 + ... + 19665520921.

It is an arithmetic number, because the mean of its divisors is an integer number (29498281380).

Almost surely, 2^78662083678 is an apocalyptic number.

78662083678 is a deficient number, since it is larger than the sum of its proper divisors (39331041842).

78662083678 is a wasteful number, since it uses less digits than its factorization.

78662083678 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39331041841.

The product of its (nonzero) digits is 32514048, while the sum is 61.

The spelling of 78662083678 in words is "seventy-eight billion, six hundred sixty-two million, eighty-three thousand, six hundred seventy-eight".