11660211533 has 2 divisors, whose sum is σ = 11660211534. Its totient is φ = 11660211532.

The previous prime is 11660211509. The next prime is 11660211547. The reversal of 11660211533 is 33511206611.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7327017604 + 4333193929 = 85598^2 + 65827^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11660211533 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 11660211496 and 11660211505.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11660211553) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5830105766 + 5830105767.

It is an arithmetic number, because the mean of its divisors is an integer number (5830105767).

Almost surely, 2^11660211533 is an apocalyptic number.

It is an amenable number.

11660211533 is a deficient number, since it is larger than the sum of its proper divisors (1).

11660211533 is an equidigital number, since it uses as much as digits as its factorization.

11660211533 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3240, while the sum is 29.

The spelling of 11660211533 in words is "eleven billion, six hundred sixty million, two hundred eleven thousand, five hundred thirty-three".