670667 has 4 divisors (see below), whose sum is σ = 710136. Its totient is φ = 631200.

The previous prime is 670639. The next prime is 670669. The reversal of 670667 is 766076.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-670667 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (670669) 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, 19709 + ... + 19742.

It is an arithmetic number, because the mean of its divisors is an integer number (177534).

2⁶⁷⁰⁶⁶⁷ is an apocalyptic number.

670667 is a deficient number, since it is larger than the sum of its proper divisors (39469).

670667 is a wasteful number, since it uses less digits than its factorization.

670667 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39468.

The product of its (nonzero) digits is 10584, while the sum is 32.

The square root of 670667 is about 818.9426109319. The cubic root of 670667 is about 87.5324287962.

The spelling of 670667 in words is "six hundred seventy thousand, six hundred sixty-seven".