1166475820 has 48 divisors (see below), whose sum is σ = 2567593728. Its totient is φ = 444297920.

The previous prime is 1166475811. The next prime is 1166475839. The reversal of 1166475820 is 285746611.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 98835 + ... + 110005.

It is an arithmetic number, because the mean of its divisors is an integer number (53491536).

Almost surely, 2^1166475820 is an apocalyptic number.

1166475820 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 1166475820, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1283796864).

1166475820 is an abundant number, since it is smaller than the sum of its proper divisors (1401117908).

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

1166475820 is a wasteful number, since it uses less digits than its factorization.

1166475820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11430 (or 11428 counting only the distinct ones).

The product of its (nonzero) digits is 80640, while the sum is 40.

The square root of 1166475820 is about 34153.7087297998. The cubic root of 1166475820 is about 1052.6691938041.

The spelling of 1166475820 in words is "one billion, one hundred sixty-six million, four hundred seventy-five thousand, eight hundred twenty".