911745666 has 128 divisors (see below), whose sum is σ = 2432505600. Its totient is φ = 250076160.

The previous prime is 911745661. The next prime is 911745707. The reversal of 911745666 is 666547119.

It is not an unprimeable number, because it can be changed into a prime (911745661) by changing a digit.

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 63 ways as a sum of consecutive naturals, for example, 224736 + ... + 228756.

It is an arithmetic number, because the mean of its divisors is an integer number (19003950).

Almost surely, 2^911745666 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 911745666, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1216252800).

911745666 is an abundant number, since it is smaller than the sum of its proper divisors (1520759934).

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

911745666 is a wasteful number, since it uses less digits than its factorization.

911745666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4081 (or 4075 counting only the distinct ones).

The product of its digits is 272160, while the sum is 45.

The square root of 911745666 is about 30195.1265273057. The cubic root of 911745666 is about 969.6713613724.

The spelling of 911745666 in words is "nine hundred eleven million, seven hundred forty-five thousand, six hundred sixty-six".