11666237837 has 2 divisors, whose sum is σ = 11666237838. Its totient is φ = 11666237836.

The previous prime is 11666237761. The next prime is 11666237887. The reversal of 11666237837 is 73873266611.

It is an a-pointer prime, because the next prime (11666237887) can be obtained adding 11666237837 to its sum of digits (50).

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 10934048356 + 732189481 = 104566^2 + 27059^2 .

It is a cyclic number.

It is not a de Polignac number, because 11666237837 - 2⁸ = 11666237581 is a prime.

It is a super-2 number, since 2×11666237837² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11666237887) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5833118918 + 5833118919.

It is an arithmetic number, because the mean of its divisors is an integer number (5833118919).

Almost surely, 2^11666237837 is an apocalyptic number.

It is an amenable number.

11666237837 is a deficient number, since it is larger than the sum of its proper divisors (1).

11666237837 is an equidigital number, since it uses as much as digits as its factorization.

11666237837 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1524096, while the sum is 50.

The spelling of 11666237837 in words is "eleven billion, six hundred sixty-six million, two hundred thirty-seven thousand, eight hundred thirty-seven".