11662211557 has 2 divisors, whose sum is σ = 11662211558. Its totient is φ = 11662211556.

The previous prime is 11662211543. The next prime is 11662211573. The reversal of 11662211557 is 75511226611.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11636799876 + 25411681 = 107874^2 + 5041^2 .

It is a cyclic number.

It is not a de Polignac number, because 11662211557 - 2¹¹ = 11662209509 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11662211507) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5831105778 + 5831105779.

It is an arithmetic number, because the mean of its divisors is an integer number (5831105779).

Almost surely, 2^11662211557 is an apocalyptic number.

It is an amenable number.

11662211557 is a deficient number, since it is larger than the sum of its proper divisors (1).

11662211557 is an equidigital number, since it uses as much as digits as its factorization.

11662211557 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 25200, while the sum is 37.

The spelling of 11662211557 in words is "eleven billion, six hundred sixty-two million, two hundred eleven thousand, five hundred fifty-seven".