667407171 has 16 divisors (see below), whose sum is σ = 923408640. Its totient is φ = 428463840.

The previous prime is 667407101. The next prime is 667407179. The reversal of 667407171 is 171704766.

It is not a de Polignac number, because 667407171 - 2⁹ = 667406659 is a prime.

It is not an unprimeable number, because it can be changed into a prime (667407179) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 27276 + ... + 45593.

It is an arithmetic number, because the mean of its divisors is an integer number (57713040).

Almost surely, 2^667407171 is an apocalyptic number.

667407171 is a deficient number, since it is larger than the sum of its proper divisors (256001469).

667407171 is a wasteful number, since it uses less digits than its factorization.

667407171 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72986.

The product of its (nonzero) digits is 49392, while the sum is 39.

The square root of 667407171 is about 25834.2247996722. The cubic root of 667407171 is about 873.9037901137.

The spelling of 667407171 in words is "six hundred sixty-seven million, four hundred seven thousand, one hundred seventy-one".