1166386782 has 128 divisors (see below), whose sum is σ = 2781757440. Its totient is φ = 322237440.

The previous prime is 1166386759. The next prime is 1166386783. The reversal of 1166386782 is 2876836611.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1166386783) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 5230323 + ... + 5230545.

It is an arithmetic number, because the mean of its divisors is an integer number (21732480).

Almost surely, 2^1166386782 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1166386782, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1390878720).

1166386782 is an abundant number, since it is smaller than the sum of its proper divisors (1615370658).

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

1166386782 is a wasteful number, since it uses less digits than its factorization.

1166386782 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 398.

The product of its digits is 580608, while the sum is 48.

The square root of 1166386782 is about 34152.4052154457. The cubic root of 1166386782 is about 1052.6424094385.

The spelling of 1166386782 in words is "one billion, one hundred sixty-six million, three hundred eighty-six thousand, seven hundred eighty-two".