1116665280 has 336 divisors, whose sum is σ = 4016922624. Its totient is φ = 284497920.

The previous prime is 1116665279. The next prime is 1116665287. The reversal of 1116665280 is 825666111.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1116665287) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 8792577 + ... + 8792703.

Almost surely, 2^1116665280 is an apocalyptic number.

1116665280 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1116665280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2008461312).

1116665280 is an abundant number, since it is smaller than the sum of its proper divisors (2900257344).

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

1116665280 is a wasteful number, since it uses less digits than its factorization.

1116665280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 264 (or 251 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 36.

The square root of 1116665280 is about 33416.5420114051. The cubic root of 1116665280 is about 1037.4671103911.

The spelling of 1116665280 in words is "one billion, one hundred sixteen million, six hundred sixty-five thousand, two hundred eighty".