66757040041 has 2 divisors, whose sum is σ = 66757040042. Its totient is φ = 66757040040.

The previous prime is 66757040039. The next prime is 66757040101. The reversal of 66757040041 is 14004075766.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 57898465641 + 8858574400 = 240621^2 + 94120^2 .

It is a cyclic number.

It is not a de Polignac number, because 66757040041 - 2¹ = 66757040039 is a prime.

Together with 66757040039, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 66757039976 and 66757040003.

It is not a weakly prime, because it can be changed into another prime (66757040641) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33378520020 + 33378520021.

It is an arithmetic number, because the mean of its divisors is an integer number (33378520021).

Almost surely, 2^66757040041 is an apocalyptic number.

It is an amenable number.

66757040041 is a deficient number, since it is larger than the sum of its proper divisors (1).

66757040041 is an equidigital number, since it uses as much as digits as its factorization.

66757040041 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 141120, while the sum is 40.

The spelling of 66757040041 in words is "sixty-six billion, seven hundred fifty-seven million, forty thousand, forty-one".