666305275 has 6 divisors (see below), whose sum is σ = 826218572. Its totient is φ = 533044200.

The previous prime is 666305273. The next prime is 666305329. The reversal of 666305275 is 572503666.

It is not a de Polignac number, because 666305275 - 2¹ = 666305273 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (666305273) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 13326081 + ... + 13326130.

Almost surely, 2^666305275 is an apocalyptic number.

666305275 is a deficient number, since it is larger than the sum of its proper divisors (159913297).

666305275 is a wasteful number, since it uses less digits than its factorization.

666305275 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26652221 (or 26652216 counting only the distinct ones).

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

The square root of 666305275 is about 25812.8897065013. The cubic root of 666305275 is about 873.4225838544.

The spelling of 666305275 in words is "six hundred sixty-six million, three hundred five thousand, two hundred seventy-five".