66107331325265 has 16 divisors (see below), whose sum is σ = 84194711027280. Its totient is φ = 49656701552640.

The previous prime is 66107331325213. The next prime is 66107331325267. The reversal of 66107331325265 is 56252313370166.

It can be written as a sum of positive squares in 8 ways, for example, as 237859093264 + 65869472232001 = 487708^2 + 8116001^2 .

It is not a de Polignac number, because 66107331325265 - 2²⁸ = 66107062889809 is a prime.

It is not an unprimeable number, because it can be changed into a prime (66107331325267) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 923637980 + ... + 923709549.

It is an arithmetic number, because the mean of its divisors is an integer number (5262169439205).

Almost surely, 2^{66107331325265} is an apocalyptic number.

It is an amenable number.

66107331325265 is a deficient number, since it is larger than the sum of its proper divisors (18087379702015).

66107331325265 is a wasteful number, since it uses less digits than its factorization.

66107331325265 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1847347972.

The product of its (nonzero) digits is 4082400, while the sum is 50.

The spelling of 66107331325265 in words is "sixty-six trillion, one hundred seven billion, three hundred thirty-one million, three hundred twenty-five thousand, two hundred sixty-five".