661227 has 24 divisors (see below), whose sum is σ = 1080576. Its totient is φ = 351648.

The previous prime is 661217. The next prime is 661231. The reversal of 661227 is 722166.

It is a happy number.

It is not a de Polignac number, because 661227 - 2⁷ = 661099 is a prime.

It is a super-2 number, since 2×661227² = 874442291058, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 661197 and 661206.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 661227.

It is not an unprimeable number, because it can be changed into a prime (661217) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 17853 + ... + 17889.

It is an arithmetic number, because the mean of its divisors is an integer number (45024).

2⁶⁶¹²²⁷ is an apocalyptic number.

661227 is a deficient number, since it is larger than the sum of its proper divisors (419349).

661227 is a wasteful number, since it uses less digits than its factorization.

661227 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 107 (or 70 counting only the distinct ones).

The product of its digits is 1008, while the sum is 24.

The square root of 661227 is about 813.1586561059. The cubic root of 661227 is about 87.1197979709.

It can be divided in two parts, 661 and 227, that added together give a palindrome (888).

The spelling of 661227 in words is "six hundred sixty-one thousand, two hundred twenty-seven".