66965427211439 has 2 divisors, whose sum is σ = 66965427211440. Its totient is φ = 66965427211438.

The previous prime is 66965427211421. The next prime is 66965427211519. The reversal of 66965427211439 is 93411272456966.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 66965427211439 - 2⁸ = 66965427211183 is a prime.

It is a super-2 number, since 2×66965427211439² (a number of 28 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (66965427211139) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33482713605719 + 33482713605720.

It is an arithmetic number, because the mean of its divisors is an integer number (33482713605720).

Almost surely, 2^{66965427211439} is an apocalyptic number.

66965427211439 is a deficient number, since it is larger than the sum of its proper divisors (1).

66965427211439 is an equidigital number, since it uses as much as digits as its factorization.

66965427211439 is an evil number, because the sum of its binary digits is even.

The product of its digits is 117573120, while the sum is 65.

The spelling of 66965427211439 in words is "sixty-six trillion, nine hundred sixty-five billion, four hundred twenty-seven million, two hundred eleven thousand, four hundred thirty-nine".