11660011551 has 12 divisors (see below), whose sum is σ = 16893126120. Its totient is φ = 7749854640.

The previous prime is 11660011499. The next prime is 11660011579. The reversal of 11660011551 is 15511006611.

11660011551 is a `hidden beast` number, since 1 + 1 + 6 + 600 + 1 + 1 + 5 + 51 = 666.

It is not a de Polignac number, because 11660011551 - 2⁹ = 11660011039 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11660018551) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1954056 + ... + 1960013.

It is an arithmetic number, because the mean of its divisors is an integer number (1407760510).

Almost surely, 2^11660011551 is an apocalyptic number.

11660011551 is a deficient number, since it is larger than the sum of its proper divisors (5233114569).

11660011551 is a wasteful number, since it uses less digits than its factorization.

11660011551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3914406 (or 3914403 counting only the distinct ones).

The product of its (nonzero) digits is 900, while the sum is 27.

The spelling of 11660011551 in words is "eleven billion, six hundred sixty million, eleven thousand, five hundred fifty-one".