66335937131 has 2 divisors, whose sum is σ = 66335937132. Its totient is φ = 66335937130.

The previous prime is 66335937113. The next prime is 66335937139. The reversal of 66335937131 is 13173953366.

Together with previous prime (66335937113) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 66335937131 - 2¹⁸ = 66335674987 is a prime.

It is a super-2 number, since 2×66335937131² (a number of 22 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (66335937139) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33167968565 + 33167968566.

It is an arithmetic number, because the mean of its divisors is an integer number (33167968566).

Almost surely, 2^66335937131 is an apocalyptic number.

66335937131 is a deficient number, since it is larger than the sum of its proper divisors (1).

66335937131 is an equidigital number, since it uses as much as digits as its factorization.

66335937131 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 918540, while the sum is 47.

The spelling of 66335937131 in words is "sixty-six billion, three hundred thirty-five million, nine hundred thirty-seven thousand, one hundred thirty-one".