667662 has 16 divisors (see below), whose sum is σ = 1344000. Its totient is φ = 221112.

The previous prime is 667657. The next prime is 667673. The reversal of 667662 is 266766.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 667662.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1089 + ... + 1587.

It is an arithmetic number, because the mean of its divisors is an integer number (84000).

2⁶⁶⁷⁶⁶² is an apocalyptic number.

667662 is an abundant number, since it is smaller than the sum of its proper divisors (676338).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

667662 is a wasteful number, since it uses less digits than its factorization.

667662 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 727.

The product of its digits is 18144, while the sum is 33.

The square root of 667662 is about 817.1058682937. The cubic root of 667662 is about 87.4015000432.

The spelling of 667662 in words is "six hundred sixty-seven thousand, six hundred sixty-two".