78222350663 has 4 divisors (see below), whose sum is σ = 78224661120. Its totient is φ = 78220040208.

The previous prime is 78222350639. The next prime is 78222350683. The reversal of 78222350663 is 36605322287.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-78222350663 is a prime.

It is a super-2 number, since 2×78222350663² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78222350683) 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, 1103678 + ... + 1172411.

It is an arithmetic number, because the mean of its divisors is an integer number (19556165280).

Almost surely, 2^78222350663 is an apocalyptic number.

78222350663 is a deficient number, since it is larger than the sum of its proper divisors (2310457).

78222350663 is a wasteful number, since it uses less digits than its factorization.

78222350663 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2310456.

The product of its (nonzero) digits is 725760, while the sum is 44.

The spelling of 78222350663 in words is "seventy-eight billion, two hundred twenty-two million, three hundred fifty thousand, six hundred sixty-three".