911049138666 has 48 divisors (see below), whose sum is σ = 1975648582440. Its totient is φ = 303420297600.

The previous prime is 911049138647. The next prime is 911049138679. The reversal of 911049138666 is 666831940119.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 244179281025 + 666869857641 = 494145^2 + 816621^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 178599516 + ... + 178604616.

Almost surely, 2^911049138666 is an apocalyptic number.

911049138666 is an abundant number, since it is smaller than the sum of its proper divisors (1064599443774).

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

911049138666 is a wasteful number, since it uses less digits than its factorization.

911049138666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11751 (or 11748 counting only the distinct ones).

The product of its (nonzero) digits is 1679616, while the sum is 54.

The spelling of 911049138666 in words is "nine hundred eleven billion, forty-nine million, one hundred thirty-eight thousand, six hundred sixty-six".