66327072121025 has 12 divisors (see below), whose sum is σ = 82353645103404. Its totient is φ = 52991931456000.

The previous prime is 66327072121021. The next prime is 66327072121151. The reversal of 66327072121025 is 52012127072366.

It can be written as a sum of positive squares in 6 ways, for example, as 7243267934224 + 59083804186801 = 2691332^2 + 7686599^2 .

It is not a de Polignac number, because 66327072121025 - 2² = 66327072121021 is a prime.

It is a super-2 number, since 2×66327072121025² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (66327072121021) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1743136616 + ... + 1743174665.

It is an arithmetic number, because the mean of its divisors is an integer number (6862803758617).

Almost surely, 2^{66327072121025} is an apocalyptic number.

It is an amenable number.

66327072121025 is a deficient number, since it is larger than the sum of its proper divisors (16026572982379).

66327072121025 is a wasteful number, since it uses less digits than its factorization.

66327072121025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3486312052 (or 3486312047 counting only the distinct ones).

The product of its (nonzero) digits is 423360, while the sum is 44.

The spelling of 66327072121025 in words is "sixty-six trillion, three hundred twenty-seven billion, seventy-two million, one hundred twenty-one thousand, twenty-five".