66911275 has 6 divisors (see below), whose sum is σ = 82970012. Its totient is φ = 53529000.

The previous prime is 66911267. The next prime is 66911287. The reversal of 66911275 is 57211966.

It is not a de Polignac number, because 66911275 - 2³ = 66911267 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1338201 + ... + 1338250.

Almost surely, 2^66911275 is an apocalyptic number.

66911275 is a deficient number, since it is larger than the sum of its proper divisors (16058737).

66911275 is a wasteful number, since it uses less digits than its factorization.

66911275 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2676461 (or 2676456 counting only the distinct ones).

The product of its digits is 22680, while the sum is 37.

The square root of 66911275 is about 8179.9312344298. The cubic root of 66911275 is about 405.9754468396.

The spelling of 66911275 in words is "sixty-six million, nine hundred eleven thousand, two hundred seventy-five".