667546 has 16 divisors (see below), whose sum is σ = 1150560. Its totient is φ = 287280.

The previous prime is 667531. The next prime is 667547. The reversal of 667546 is 645766.

It is a d-powerful number, because it can be written as 6² + 6⁵ + 5 + 7⁶ + 4⁹ + 6⁷ .

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, 381 + ... + 1216.

It is an arithmetic number, because the mean of its divisors is an integer number (71910).

2⁶⁶⁷⁵⁴⁶ is an apocalyptic number.

667546 is a deficient number, since it is larger than the sum of its proper divisors (483014).

667546 is a wasteful number, since it uses less digits than its factorization.

667546 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1629.

The product of its digits is 30240, while the sum is 34.

The square root of 667546 is about 817.0348829762. The cubic root of 667546 is about 87.3964380202.

The spelling of 667546 in words is "six hundred sixty-seven thousand, five hundred forty-six".