667541 has 8 divisors (see below), whose sum is σ = 779520. Its totient is φ = 559728.

The previous prime is 667531. The next prime is 667547. The reversal of 667541 is 145766.

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 667541 - 2⁶ = 667477 is a prime.

It is a super-2 number, since 2×667541² = 891221973362, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (667547) 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, 686 + ... + 1343.

It is an arithmetic number, because the mean of its divisors is an integer number (97440).

2⁶⁶⁷⁵⁴¹ is an apocalyptic number.

It is an amenable number.

667541 is a deficient number, since it is larger than the sum of its proper divisors (111979).

667541 is a wasteful number, since it uses less digits than its factorization.

667541 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2083.

The product of its digits is 5040, while the sum is 29.

The square root of 667541 is about 817.0318231256. The cubic root of 667541 is about 87.3962198164.

The spelling of 667541 in words is "six hundred sixty-seven thousand, five hundred forty-one".