664227 has 16 divisors (see below), whose sum is σ = 1000480. Its totient is φ = 435456.

The previous prime is 664211. The next prime is 664243. The reversal of 664227 is 722466.

It is an interprime number because it is at equal distance from previous prime (664211) and next prime (664243).

It is not a de Polignac number, because 664227 - 2⁴ = 664211 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an Ulam number.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 664227.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 664227.

It is not an unprimeable number, because it can be changed into a prime (664427) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1803 + ... + 2139.

It is an arithmetic number, because the mean of its divisors is an integer number (62530).

2⁶⁶⁴²²⁷ is an apocalyptic number.

664227 is a deficient number, since it is larger than the sum of its proper divisors (336253).

664227 is a wasteful number, since it uses less digits than its factorization.

664227 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 419 (or 413 counting only the distinct ones).

The product of its digits is 4032, while the sum is 27.

The square root of 664227 is about 815.0012269929. The cubic root of 664227 is about 87.2513539635.

The spelling of 664227 in words is "six hundred sixty-four thousand, two hundred twenty-seven".