1778706582366 has 96 divisors (see below), whose sum is σ = 4365430709760. Its totient is φ = 480413856384.

The previous prime is 1778706582329. The next prime is 1778706582403. The reversal of 1778706582366 is 6632856078771.

It is an interprime number because it is at equal distance from previous prime (1778706582329) and next prime (1778706582403).

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1778706582297 and 1778706582306.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 2242450 + ... + 2930186.

It is an arithmetic number, because the mean of its divisors is an integer number (45473236560).

Almost surely, 2^{1778706582366} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1778706582366, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2182715354880).

1778706582366 is an abundant number, since it is smaller than the sum of its proper divisors (2586724127394).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1778706582366 is a wasteful number, since it uses less digits than its factorization.

1778706582366 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 688238 (or 688231 counting only the distinct ones).

The product of its (nonzero) digits is 142248960, while the sum is 66.

The spelling of 1778706582366 in words is "one trillion, seven hundred seventy-eight billion, seven hundred six million, five hundred eighty-two thousand, three hundred sixty-six".