66275311725 has 60 divisors (see below), whose sum is σ = 140302644064. Its totient is φ = 30297278880.

The previous prime is 66275311721. The next prime is 66275311727. The reversal of 66275311725 is 52711357266.

It is a happy number.

66275311725 is a `hidden beast` number, since 6 + 627 + 5 + 3 + 1 + 17 + 2 + 5 = 666.

It is not a de Polignac number, because 66275311725 - 2² = 66275311721 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66275311721) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 59 ways as a sum of consecutive naturals, for example, 2323579 + ... + 2351928.

Almost surely, 2^66275311725 is an apocalyptic number.

It is an amenable number.

66275311725 is an abundant number, since it is smaller than the sum of its proper divisors (74027332339).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

66275311725 is a wasteful number, since it uses less digits than its factorization.

66275311725 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4675536 (or 4675522 counting only the distinct ones).

The product of its digits is 529200, while the sum is 45.

The spelling of 66275311725 in words is "sixty-six billion, two hundred seventy-five million, three hundred eleven thousand, seven hundred twenty-five".