66162044334457 has 2 divisors, whose sum is σ = 66162044334458. Its totient is φ = 66162044334456.

The previous prime is 66162044334439. The next prime is 66162044334461. The reversal of 66162044334457 is 75443344026166.

66162044334457 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 65769894098496 + 392150235961 = 8109864^2 + 626219^2 .

It is a cyclic number.

It is not a de Polignac number, because 66162044334457 - 2¹¹ = 66162044332409 is a prime.

It is a super-2 number, since 2×66162044334457² (a number of 28 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 66162044334398 and 66162044334407.

It is not a weakly prime, because it can be changed into another prime (66162044334427) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33081022167228 + 33081022167229.

It is an arithmetic number, because the mean of its divisors is an integer number (33081022167229).

Almost surely, 2^{66162044334457} is an apocalyptic number.

It is an amenable number.

66162044334457 is a deficient number, since it is larger than the sum of its proper divisors (1).

66162044334457 is an equidigital number, since it uses as much as digits as its factorization.

66162044334457 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 34836480, while the sum is 55.

The spelling of 66162044334457 in words is "sixty-six trillion, one hundred sixty-two billion, forty-four million, three hundred thirty-four thousand, four hundred fifty-seven".