667197 has 10 divisors (see below), whose sum is σ = 996798. Its totient is φ = 444744.

The previous prime is 667181. The next prime is 667211. The reversal of 667197 is 791766.

It can be written as a sum of positive squares in only one way, i.e., 599076 + 68121 = 774^2 + 261^2 .

It is not a de Polignac number, because 667197 - 2⁴ = 667181 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (667127) 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 9 ways as a sum of consecutive naturals, for example, 4038 + ... + 4199.

2⁶⁶⁷¹⁹⁷ is an apocalyptic number.

It is an amenable number.

667197 is a deficient number, since it is larger than the sum of its proper divisors (329601).

667197 is an equidigital number, since it uses as much as digits as its factorization.

667197 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8249 (or 8240 counting only the distinct ones).

The product of its digits is 15876, while the sum is 36.

The square root of 667197 is about 816.8212778815. The cubic root of 667197 is about 87.3812047759.

The spelling of 667197 in words is "six hundred sixty-seven thousand, one hundred ninety-seven".