1166215552 has 64 divisors (see below), whose sum is σ = 2432332800. Its totient is φ = 555917824.

The previous prime is 1166215537. The next prime is 1166215553. The reversal of 1166215552 is 2555126611.

It is a tau number, because it is divible by the number of its divisors (64).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1166215553) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1409763 + ... + 1410589.

It is an arithmetic number, because the mean of its divisors is an integer number (38005200).

Almost surely, 2^1166215552 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1166215552, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1216166400).

1166215552 is an abundant number, since it is smaller than the sum of its proper divisors (1266117248).

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

1166215552 is an equidigital number, since it uses as much as digits as its factorization.

1166215552 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1343 (or 1331 counting only the distinct ones).

The product of its digits is 18000, while the sum is 34.

The square root of 1166215552 is about 34149.8982721764. The cubic root of 1166215552 is about 1052.5908962859.

The spelling of 1166215552 in words is "one billion, one hundred sixty-six million, two hundred fifteen thousand, five hundred fifty-two".