66825275 has 18 divisors (see below), whose sum is σ = 91085316. Its totient is φ = 48598000.

The previous prime is 66825233. The next prime is 66825277. The reversal of 66825275 is 57252866.

It is not a de Polignac number, because 66825275 - 2¹⁴ = 66808891 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66825277) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 8021 + ... + 14070.

Almost surely, 2^66825275 is an apocalyptic number.

66825275 is a deficient number, since it is larger than the sum of its proper divisors (24260041).

66825275 is a wasteful number, since it uses less digits than its factorization.

66825275 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22123 (or 22107 counting only the distinct ones).

The product of its digits is 201600, while the sum is 41.

The square root of 66825275 is about 8174.6727763257. The cubic root of 66825275 is about 405.8014410027.

The spelling of 66825275 in words is "sixty-six million, eight hundred twenty-five thousand, two hundred seventy-five".