11001661712 has 10 divisors (see below), whose sum is σ = 21315719598. Its totient is φ = 5500830848.

The previous prime is 11001661709. The next prime is 11001661717. The reversal of 11001661712 is 21716610011.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 9585193216 + 1416468496 = 97904^2 + 37636^2 .

It is not an unprimeable number, because it can be changed into a prime (11001661717) 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 as a sum of consecutive naturals, namely, 343801913 + ... + 343801944.

Almost surely, 2^11001661712 is an apocalyptic number.

It is an amenable number.

11001661712 is a deficient number, since it is larger than the sum of its proper divisors (10314057886).

11001661712 is an equidigital number, since it uses as much as digits as its factorization.

11001661712 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 687603865 (or 687603859 counting only the distinct ones).

The product of its (nonzero) digits is 504, while the sum is 26.

The spelling of 11001661712 in words is "eleven billion, one million, six hundred sixty-one thousand, seven hundred twelve".