818667 has 14 divisors (see below), whose sum is σ = 1228532. Its totient is φ = 545292.

The previous prime is 818659. The next prime is 818683. The reversal of 818667 is 766818.

It is not a de Polignac number, because 818667 - 2³ = 818659 is a prime.

It is a Duffinian number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 818667.

It is not an unprimeable number, because it can be changed into a prime (818687) by changing a digit.

It is a polite number, since it can be written in 13 ways as a sum of consecutive naturals, for example, 168 + ... + 1290.

2⁸¹⁸⁶⁶⁷ is an apocalyptic number.

818667 is a deficient number, since it is larger than the sum of its proper divisors (409865).

818667 is an equidigital number, since it uses as much as digits as its factorization.

818667 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1141 (or 1126 counting only the distinct ones).

The product of its digits is 16128, while the sum is 36.

The square root of 818667 is about 904.8021883263. The cubic root of 818667 is about 93.5482702324.

It can be divided in two parts, 818 and 667, that added together give a triangular number (1485 = T₅₄).

The spelling of 818667 in words is "eight hundred eighteen thousand, six hundred sixty-seven".