667941 has 4 divisors (see below), whose sum is σ = 890592. Its totient is φ = 445292.

The previous prime is 667921. The next prime is 667949. The reversal of 667941 is 149766.

It is a happy number.

667941 is nontrivially palindromic in base 5.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 667941 - 2¹⁷ = 536869 is a prime.

It is a super-2 number, since 2×667941² = 892290358962, which contains 22 as substring.

It is a D-number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (667949) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 111321 + ... + 111326.

It is an arithmetic number, because the mean of its divisors is an integer number (222648).

2⁶⁶⁷⁹⁴¹ is an apocalyptic number.

It is an amenable number.

667941 is a deficient number, since it is larger than the sum of its proper divisors (222651).

667941 is a wasteful number, since it uses less digits than its factorization.

667941 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 222650.

The product of its digits is 9072, while the sum is 33.

The square root of 667941 is about 817.2765749732. The cubic root of 667941 is about 87.4136726808.

It can be divided in two parts, 66794 and 1, that added together give a triangular number (66795 = T₃₆₅).

The spelling of 667941 in words is "six hundred sixty-seven thousand, nine hundred forty-one".