66274148225 has 6 divisors (see below), whose sum is σ = 82179943830. Its totient is φ = 53019318560.

The previous prime is 66274148201. The next prime is 66274148233. The reversal of 66274148225 is 52284147266.

It can be written as a sum of positive squares in 3 ways, for example, as 835903744 + 65438244481 = 28912^2 + 255809^2 .

It is not a de Polignac number, because 66274148225 - 2¹⁰ = 66274147201 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 66274148225.

It is an unprimeable number.

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 in 5 ways as a sum of consecutive naturals, for example, 1325482940 + ... + 1325482989.

It is an arithmetic number, because the mean of its divisors is an integer number (13696657305).

Almost surely, 2^66274148225 is an apocalyptic number.

It is an amenable number.

66274148225 is a deficient number, since it is larger than the sum of its proper divisors (15905795605).

66274148225 is a wasteful number, since it uses less digits than its factorization.

66274148225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2650965939 (or 2650965934 counting only the distinct ones).

The product of its digits is 1290240, while the sum is 47.

The spelling of 66274148225 in words is "sixty-six billion, two hundred seventy-four million, one hundred forty-eight thousand, two hundred twenty-five".