11666051255641 has 16 divisors (see below), whose sum is σ = 12118278977280. Its totient is φ = 11222390471040.

The previous prime is 11666051255633. The next prime is 11666051255657. The reversal of 11666051255641 is 14655215066611.

It is a cyclic number.

It is not a de Polignac number, because 11666051255641 - 2³ = 11666051255633 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11666051255041) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15950335 + ... + 16665691.

It is an arithmetic number, because the mean of its divisors is an integer number (757392436080).

Almost surely, 2^{11666051255641} is an apocalyptic number.

It is an amenable number.

11666051255641 is a deficient number, since it is larger than the sum of its proper divisors (452227721639).

11666051255641 is an equidigital number, since it uses as much as digits as its factorization.

11666051255641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 721344.

The product of its (nonzero) digits is 1296000, while the sum is 49.

The spelling of 11666051255641 in words is "eleven trillion, six hundred sixty-six billion, fifty-one million, two hundred fifty-five thousand, six hundred forty-one".