66137431747 has 2 divisors, whose sum is σ = 66137431748. Its totient is φ = 66137431746.

The previous prime is 66137431673. The next prime is 66137431751. The reversal of 66137431747 is 74713473166.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 66137431747 - 2¹⁵ = 66137398979 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 66137431747.

It is not a weakly prime, because it can be changed into another prime (66137431777) 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, 33068715873 + 33068715874.

It is an arithmetic number, because the mean of its divisors is an integer number (33068715874).

Almost surely, 2^66137431747 is an apocalyptic number.

66137431747 is a deficient number, since it is larger than the sum of its proper divisors (1).

66137431747 is an equidigital number, since it uses as much as digits as its factorization.

66137431747 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1778112, while the sum is 49.

The spelling of 66137431747 in words is "sixty-six billion, one hundred thirty-seven million, four hundred thirty-one thousand, seven hundred forty-seven".