660408227 has 4 divisors (see below), whose sum is σ = 678257136. Its totient is φ = 642559320.

The previous prime is 660408211. The next prime is 660408239. The reversal of 660408227 is 722804066.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 660408227 - 2⁴ = 660408211 is a prime.

It is a super-2 number, since 2×660408227² = 872278052578567058, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (660408247) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8924399 + ... + 8924472.

It is an arithmetic number, because the mean of its divisors is an integer number (169564284).

Almost surely, 2^660408227 is an apocalyptic number.

660408227 is a deficient number, since it is larger than the sum of its proper divisors (17848909).

660408227 is a wasteful number, since it uses less digits than its factorization.

660408227 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17848908.

The product of its (nonzero) digits is 32256, while the sum is 35.

The square root of 660408227 is about 25698.4090363587. The cubic root of 660408227 is about 870.8382404115.

The spelling of 660408227 in words is "six hundred sixty million, four hundred eight thousand, two hundred twenty-seven".