66230947505519 has 2 divisors, whose sum is σ = 66230947505520. Its totient is φ = 66230947505518.

The previous prime is 66230947505483. The next prime is 66230947505539. The reversal of 66230947505519 is 91550574903266.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-66230947505519 is a prime.

It is a super-2 number, since 2×66230947505519² (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 (66230947505539) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33115473752759 + 33115473752760.

It is an arithmetic number, because the mean of its divisors is an integer number (33115473752760).

Almost surely, 2^{66230947505519} is an apocalyptic number.

66230947505519 is a deficient number, since it is larger than the sum of its proper divisors (1).

66230947505519 is an equidigital number, since it uses as much as digits as its factorization.

66230947505519 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 61236000, while the sum is 62.

The spelling of 66230947505519 in words is "sixty-six trillion, two hundred thirty billion, nine hundred forty-seven million, five hundred five thousand, five hundred nineteen".