66315444149 has 2 divisors, whose sum is σ = 66315444150. Its totient is φ = 66315444148.

The previous prime is 66315444119. The next prime is 66315444179. The reversal of 66315444149 is 94144451366.

It is a balanced prime because it is at equal distance from previous prime (66315444119) and next prime (66315444179).

It can be written as a sum of positive squares in only one way, i.e., 62175422500 + 4140021649 = 249350^2 + 64343^2 .

It is a cyclic number.

It is not a de Polignac number, because 66315444149 - 2⁸ = 66315443893 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (66315444119) 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, 33157722074 + 33157722075.

It is an arithmetic number, because the mean of its divisors is an integer number (33157722075).

Almost surely, 2^66315444149 is an apocalyptic number.

It is an amenable number.

66315444149 is a deficient number, since it is larger than the sum of its proper divisors (1).

66315444149 is an equidigital number, since it uses as much as digits as its factorization.

66315444149 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1244160, while the sum is 47.

The spelling of 66315444149 in words is "sixty-six billion, three hundred fifteen million, four hundred forty-four thousand, one hundred forty-nine".