66266275 has 12 divisors (see below), whose sum is σ = 82481824. Its totient is φ = 52812000.

The previous prime is 66266237. The next prime is 66266279. The reversal of 66266275 is 57266266.

It is a happy number.

It is not a de Polignac number, because 66266275 - 2⁷ = 66266147 is a prime.

It is a hoax number, since the sum of its digits (40) coincides with the sum of the digits of its distinct prime factors.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66266279) 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, 1885 + ... + 11665.

Almost surely, 2^66266275 is an apocalyptic number.

66266275 is a deficient number, since it is larger than the sum of its proper divisors (16215549).

66266275 is a wasteful number, since it uses less digits than its factorization.

66266275 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10062 (or 10057 counting only the distinct ones).

The product of its digits is 181440, while the sum is 40.

The square root of 66266275 is about 8140.4100019594. The cubic root of 66266275 is about 404.6667481644. Note that the first 3 decimals are identical.

Subtracting from 66266275 its reverse (57266266), we obtain a palindrome (9000009).

The spelling of 66266275 in words is "sixty-six million, two hundred sixty-six thousand, two hundred seventy-five".