667923 has 8 divisors (see below), whose sum is σ = 904128. Its totient is φ = 438504.

The previous prime is 667921. The next prime is 667949. The reversal of 667923 is 329766.

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

It is not a de Polignac number, because 667923 - 2¹ = 667921 is a prime.

It is a super-2 number, since 2×667923² = 892242267858, which contains 22 as substring.

It is a plaindrome in base 14.

It is not an unprimeable number, because it can be changed into a prime (667921) 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, 1461 + ... + 1862.

It is an arithmetic number, because the mean of its divisors is an integer number (113016).

2⁶⁶⁷⁹²³ is an apocalyptic number.

667923 is a deficient number, since it is larger than the sum of its proper divisors (236205).

667923 is a wasteful number, since it uses less digits than its factorization.

667923 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3393.

The product of its digits is 13608, while the sum is 33.

The square root of 667923 is about 817.2655627151. The cubic root of 667923 is about 87.4128874516.

It can be divided in two parts, 66792 and 3, that added together give a triangular number (66795 = T₃₆₅).

The spelling of 667923 in words is "six hundred sixty-seven thousand, nine hundred twenty-three".