66124523137 has 2 divisors, whose sum is σ = 66124523138. Its totient is φ = 66124523136.

The previous prime is 66124523119. The next prime is 66124523167. The reversal of 66124523137 is 73132542166.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 66112751376 + 11771761 = 257124^2 + 3431^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-66124523137 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 66124523137.

It is not a weakly prime, because it can be changed into another prime (66124523167) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33062261568 + 33062261569.

It is an arithmetic number, because the mean of its divisors is an integer number (33062261569).

Almost surely, 2^66124523137 is an apocalyptic number.

It is an amenable number.

66124523137 is a deficient number, since it is larger than the sum of its proper divisors (1).

66124523137 is an equidigital number, since it uses as much as digits as its factorization.

66124523137 is an evil number, because the sum of its binary digits is even.

The product of its digits is 181440, while the sum is 40.

The spelling of 66124523137 in words is "sixty-six billion, one hundred twenty-four million, five hundred twenty-three thousand, one hundred thirty-seven".