670998 has 8 divisors (see below), whose sum is σ = 1342008. Its totient is φ = 223664.

The previous prime is 670991. The next prime is 671003. The reversal of 670998 is 899076.

670998 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

670998 is an admirable number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (670991) by changing a digit.

670998 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 55911 + ... + 55922.

It is an arithmetic number, because the mean of its divisors is an integer number (167751).

2⁶⁷⁰⁹⁹⁸ is an apocalyptic number.

670998 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

670998 is a wasteful number, since it uses less digits than its factorization.

670998 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 111838.

The product of its (nonzero) digits is 27216, while the sum is 39.

The square root of 670998 is about 819.1446758662. The cubic root of 670998 is about 87.5468266364.

The spelling of 670998 in words is "six hundred seventy thousand, nine hundred ninety-eight".