66275425 has 6 divisors (see below), whose sum is σ = 82181558. Its totient is φ = 53020320.

The previous prime is 66275423. The next prime is 66275437. The reversal of 66275425 is 52457266.

66275425 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 3 ways, for example, as 15124321 + 51151104 = 3889^2 + 7152^2 .

It is not a de Polignac number, because 66275425 - 2¹ = 66275423 is a prime.

It is a super-3 number, since 3×66275425³ (a number of 24 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66275423) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1325484 + ... + 1325533.

Almost surely, 2^66275425 is an apocalyptic number.

It is an amenable number.

66275425 is a deficient number, since it is larger than the sum of its proper divisors (15906133).

66275425 is a wasteful number, since it uses less digits than its factorization.

66275425 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2651027 (or 2651022 counting only the distinct ones).

The product of its digits is 100800, while the sum is 37.

The square root of 66275425 is about 8140.9719935644. The cubic root of 66275425 is about 404.6853726726.

The spelling of 66275425 in words is "sixty-six million, two hundred seventy-five thousand, four hundred twenty-five".