66375265 has 24 divisors (see below), whose sum is σ = 91732608. Its totient is φ = 45718560.

The previous prime is 66375251. The next prime is 66375277. The reversal of 66375265 is 56257366.

It is not a de Polignac number, because 66375265 - 2¹¹ = 66373217 is a prime.

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

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 18184 + ... + 21526.

It is an arithmetic number, because the mean of its divisors is an integer number (3822192).

Almost surely, 2^66375265 is an apocalyptic number.

It is an amenable number.

66375265 is a deficient number, since it is larger than the sum of its proper divisors (25357343).

66375265 is a wasteful number, since it uses less digits than its factorization.

66375265 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3397 (or 3378 counting only the distinct ones).

The product of its digits is 226800, while the sum is 40.

The square root of 66375265 is about 8147.1016318688. The cubic root of 66375265 is about 404.8884822261. Note that the first 3 decimals are identical.

The spelling of 66375265 in words is "sixty-six million, three hundred seventy-five thousand, two hundred sixty-five".