667877 has 8 divisors (see below), whose sum is σ = 774336. Its totient is φ = 564192.

The previous prime is 667867. The next prime is 667883. The reversal of 667877 is 778766.

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

It is a cyclic number.

It is not a de Polignac number, because 667877 - 2⁴ = 667861 is a prime.

It is a Duffinian number.

It is a plaindrome in base 14.

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 667877.

It is not an unprimeable number, because it can be changed into a prime (667817) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 143 + ... + 1164.

It is an arithmetic number, because the mean of its divisors is an integer number (96792).

2⁶⁶⁷⁸⁷⁷ is an apocalyptic number.

It is an amenable number.

667877 is a deficient number, since it is larger than the sum of its proper divisors (106459).

667877 is a wasteful number, since it uses less digits than its factorization.

667877 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1387.

The product of its digits is 98784, while the sum is 41.

The square root of 667877 is about 817.2374196034. The cubic root of 667877 is about 87.4108806908.

Subtracting 667877 from its reverse (778766), we obtain a square (110889 = 333²).

The spelling of 667877 in words is "six hundred sixty-seven thousand, eight hundred seventy-seven".