11550151666 has 4 divisors (see below), whose sum is σ = 17325227502. Its totient is φ = 5775075832.

The previous prime is 11550151663. The next prime is 11550151681. The reversal of 11550151666 is 66615105511.

11550151666 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 66615105511 = 41 ⋅1624758671.

It can be written as a sum of positive squares in only one way, i.e., 7583797225 + 3966354441 = 87085^2 + 62979^2 .

It is not an unprimeable number, because it can be changed into a prime (11550151663) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2887537915 + ... + 2887537918.

Almost surely, 2^11550151666 is an apocalyptic number.

11550151666 is a deficient number, since it is larger than the sum of its proper divisors (5775075836).

11550151666 is an equidigital number, since it uses as much as digits as its factorization.

11550151666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5775075835.

The product of its (nonzero) digits is 27000, while the sum is 37.

It can be divided in two parts, 11550 and 151666, that added together give a square (163216 = 404²).

The spelling of 11550151666 in words is "eleven billion, five hundred fifty million, one hundred fifty-one thousand, six hundred sixty-six".