1166454720 has 168 divisors, whose sum is σ = 4024768176. Its totient is φ = 310075392.

The previous prime is 1166454691. The next prime is 1166454739. The reversal of 1166454720 is 274546611.

1166454720 is a `hidden beast` number, since 1 + 1 + 6 + 645 + 4 + 7 + 2 + 0 = 666.

It is a super-2 number, since 2×1166454720² = 2721233227620556800, which contains 22 as substring.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1707499 + ... + 1708181.

Almost surely, 2^1166454720 is an apocalyptic number.

1166454720 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 1166454720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2012384088).

1166454720 is an abundant number, since it is smaller than the sum of its proper divisors (2858313456).

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

1166454720 is a wasteful number, since it uses less digits than its factorization.

1166454720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1299 (or 1286 counting only the distinct ones).

The product of its (nonzero) digits is 40320, while the sum is 36.

The square root of 1166454720 is about 34153.3998307636. The cubic root of 1166454720 is about 1052.6628466361.

The spelling of 1166454720 in words is "one billion, one hundred sixty-six million, four hundred fifty-four thousand, seven hundred twenty".