11660651666 has 4 divisors (see below), whose sum is σ = 17490977502. Its totient is φ = 5830325832.

The previous prime is 11660651627. The next prime is 11660651677. The reversal of 11660651666 is 66615606611.

11660651666 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.

It can be written as a sum of positive squares in only one way, i.e., 11584001641 + 76650025 = 107629^2 + 8755^2 .

It is a Curzon number.

It is an unprimeable number.

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, 2915162915 + ... + 2915162918.

Almost surely, 2^11660651666 is an apocalyptic number.

11660651666 is a deficient number, since it is larger than the sum of its proper divisors (5830325836).

11660651666 is an equidigital number, since it uses as much as digits as its factorization.

11660651666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5830325835.

The product of its (nonzero) digits is 233280, while the sum is 44.

The spelling of 11660651666 in words is "eleven billion, six hundred sixty million, six hundred fifty-one thousand, six hundred sixty-six".