667131 has 16 divisors (see below), whose sum is σ = 958464. Its totient is φ = 411264.

The previous prime is 667129. The next prime is 667141. The reversal of 667131 is 131766.

It is not a de Polignac number, because 667131 - 2¹ = 667129 is a prime.

It is a super-2 number, since 2×667131² = 890127542322, which contains 22 as substring.

667131 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (667141) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5190 + ... + 5316.

It is an arithmetic number, because the mean of its divisors is an integer number (59904).

2⁶⁶⁷¹³¹ is an apocalyptic number.

667131 is a deficient number, since it is larger than the sum of its proper divisors (291333).

667131 is a wasteful number, since it uses less digits than its factorization.

667131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 250.

The product of its digits is 756, while the sum is 24.

The square root of 667131 is about 816.7808763677. The cubic root of 667131 is about 87.3783233932.

Adding to 667131 its reverse (131766), we get a palindrome (798897).

The spelling of 667131 in words is "six hundred sixty-seven thousand, one hundred thirty-one".