11556768066 has 16 divisors (see below), whose sum is σ = 23122164000. Its totient is φ = 3850818048.

The previous prime is 11556768053. The next prime is 11556768077. The reversal of 11556768066 is 66086765511.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 342016 + ... + 374283.

It is an arithmetic number, because the mean of its divisors is an integer number (1445135250).

Almost surely, 2^11556768066 is an apocalyptic number.

11556768066 is an abundant number, since it is smaller than the sum of its proper divisors (11565395934).

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

11556768066 is a wasteful number, since it uses less digits than its factorization.

11556768066 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 718993.

The product of its (nonzero) digits is 1814400, while the sum is 51.

The spelling of 11556768066 in words is "eleven billion, five hundred fifty-six million, seven hundred sixty-eight thousand, sixty-six".