670658 has 8 divisors (see below), whose sum is σ = 1016652. Its totient is φ = 331776.

The previous prime is 670639. The next prime is 670669. The reversal of 670658 is 856076.

670658 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 588289 + 82369 = 767^2 + 287^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1535 + ... + 1922.

2⁶⁷⁰⁶⁵⁸ is an apocalyptic number.

670658 is a deficient number, since it is larger than the sum of its proper divisors (345994).

670658 is a wasteful number, since it uses less digits than its factorization.

670658 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3556.

The product of its (nonzero) digits is 10080, while the sum is 32.

The square root of 670658 is about 818.9371160230. The cubic root of 670658 is about 87.5320372480.

The spelling of 670658 in words is "six hundred seventy thousand, six hundred fifty-eight".