78660716333 has 4 divisors (see below), whose sum is σ = 79095306108. Its totient is φ = 78226126560.

The previous prime is 78660716317. The next prime is 78660716339. The reversal of 78660716333 is 33361706687.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 33361706687 = 68227 ⋅488981.

It can be written as a sum of positive squares in 2 ways, for example, as 30215825929 + 48444890404 = 173827^2 + 220102^2 .

It is a cyclic number.

It is not a de Polignac number, because 78660716333 - 2⁴ = 78660716317 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 (78660716339) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 217294616 + ... + 217294977.

It is an arithmetic number, because the mean of its divisors is an integer number (19773826527).

Almost surely, 2^78660716333 is an apocalyptic number.

It is an amenable number.

78660716333 is a deficient number, since it is larger than the sum of its proper divisors (434589775).

78660716333 is a wasteful number, since it uses less digits than its factorization.

78660716333 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 434589774.

The product of its (nonzero) digits is 2286144, while the sum is 50.

The spelling of 78660716333 in words is "seventy-eight billion, six hundred sixty million, seven hundred sixteen thousand, three hundred thirty-three".