78616664474 has 32 divisors (see below), whose sum is σ = 119564024832. Its totient is φ = 38765790000.

The previous prime is 78616664471. The next prime is 78616664479. The reversal of 78616664474 is 47446661687.

It is not an unprimeable number, because it can be changed into a prime (78616664471) 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 15 ways as a sum of consecutive naturals, for example, 74801249 + ... + 74802299.

It is an arithmetic number, because the mean of its divisors is an integer number (3736375776).

Almost surely, 2^78616664474 is an apocalyptic number.

78616664474 is a deficient number, since it is larger than the sum of its proper divisors (40947360358).

78616664474 is a wasteful number, since it uses less digits than its factorization.

78616664474 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2402.

The product of its digits is 32514048, while the sum is 59.

The spelling of 78616664474 in words is "seventy-eight billion, six hundred sixteen million, six hundred sixty-four thousand, four hundred seventy-four".