667608 has 16 divisors (see below), whose sum is σ = 1669080. Its totient is φ = 222528.

The previous prime is 667577. The next prime is 667631. The reversal of 667608 is 806766.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 13885 + ... + 13932.

2⁶⁶⁷⁶⁰⁸ is an apocalyptic number.

It is an amenable number.

667608 is an abundant number, since it is smaller than the sum of its proper divisors (1001472).

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

667608 is a wasteful number, since it uses less digits than its factorization.

667608 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27826 (or 27822 counting only the distinct ones).

The product of its (nonzero) digits is 12096, while the sum is 33.

The square root of 667608 is about 817.0728241718. The cubic root of 667608 is about 87.3991436572.

It can be divided in two parts, 667 and 608, that added together give a triangular number (1275 = T₅₀).

The spelling of 667608 in words is "six hundred sixty-seven thousand, six hundred eight".