667587 has 8 divisors (see below), whose sum is σ = 895504. Its totient is φ = 442368.

The previous prime is 667577. The next prime is 667631. The reversal of 667587 is 785766.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a de Polignac number, because none of the positive numbers 2^k-667587 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 667587.

It is not an unprimeable number, because it can be changed into a prime (667507) 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 7 ways as a sum of consecutive naturals, for example, 3 + ... + 1155.

It is an arithmetic number, because the mean of its divisors is an integer number (111938).

2⁶⁶⁷⁵⁸⁷ is an apocalyptic number.

667587 is a deficient number, since it is larger than the sum of its proper divisors (227917).

667587 is a wasteful number, since it uses less digits than its factorization.

667587 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1349.

The product of its digits is 70560, while the sum is 39.

The square root of 667587 is about 817.0599733190. The cubic root of 667587 is about 87.3982272505.

The spelling of 667587 in words is "six hundred sixty-seven thousand, five hundred eighty-seven".