667504197 has 12 divisors (see below), whose sum is σ = 968745024. Its totient is φ = 442892520.

The previous prime is 667504193. The next prime is 667504213. The reversal of 667504197 is 791405766.

It is a happy number.

667504197 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 667504197 - 2² = 667504193 is a prime.

It is a super-2 number, since 2×667504197² = 891123706025229618, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (667504193) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 173853 + ... + 177650.

It is an arithmetic number, because the mean of its divisors is an integer number (80728752).

Almost surely, 2^667504197 is an apocalyptic number.

It is an amenable number.

667504197 is a deficient number, since it is larger than the sum of its proper divisors (301240827).

667504197 is a wasteful number, since it uses less digits than its factorization.

667504197 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 351720 (or 351717 counting only the distinct ones).

The product of its (nonzero) digits is 317520, while the sum is 45.

The square root of 667504197 is about 25836.1025892064. The cubic root of 667504197 is about 873.9461367172.

The spelling of 667504197 in words is "six hundred sixty-seven million, five hundred four thousand, one hundred ninety-seven".