66959275 has 12 divisors (see below), whose sum is σ = 83149192. Its totient is φ = 53490240.

The previous prime is 66959267. The next prime is 66959281. The reversal of 66959275 is 57295966.

It is not a de Polignac number, because 66959275 - 2³ = 66959267 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 21199 + ... + 24151.

Almost surely, 2^66959275 is an apocalyptic number.

66959275 is a deficient number, since it is larger than the sum of its proper divisors (16189917).

66959275 is a wasteful number, since it uses less digits than its factorization.

66959275 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3870 (or 3865 counting only the distinct ones).

The product of its digits is 1020600, while the sum is 49.

The square root of 66959275 is about 8182.8647184223. The cubic root of 66959275 is about 406.0725015515.

The spelling of 66959275 in words is "sixty-six million, nine hundred fifty-nine thousand, two hundred seventy-five".