66242124757 has 2 divisors, whose sum is σ = 66242124758. Its totient is φ = 66242124756.

The previous prime is 66242124749. The next prime is 66242124797. The reversal of 66242124757 is 75742124266.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 52145549316 + 14096575441 = 228354^2 + 118729^2 .

It is a cyclic number.

It is not a de Polignac number, because 66242124757 - 2³ = 66242124749 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (66242124727) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33121062378 + 33121062379.

It is an arithmetic number, because the mean of its divisors is an integer number (33121062379).

Almost surely, 2^66242124757 is an apocalyptic number.

It is an amenable number.

66242124757 is a deficient number, since it is larger than the sum of its proper divisors (1).

66242124757 is an equidigital number, since it uses as much as digits as its factorization.

66242124757 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1128960, while the sum is 46.

The spelling of 66242124757 in words is "sixty-six billion, two hundred forty-two million, one hundred twenty-four thousand, seven hundred fifty-seven".