670557 has 8 divisors (see below), whose sum is σ = 905184. Its totient is φ = 441488.

The previous prime is 670543. The next prime is 670559. The reversal of 670557 is 755076.

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

It is a cyclic number.

It is not a de Polignac number, because 670557 - 2⁴ = 670541 is a prime.

670557 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (670559) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1098 + ... + 1595.

It is an arithmetic number, because the mean of its divisors is an integer number (113148).

2⁶⁷⁰⁵⁵⁷ is an apocalyptic number.

It is an amenable number.

670557 is a deficient number, since it is larger than the sum of its proper divisors (234627).

670557 is a wasteful number, since it uses less digits than its factorization.

670557 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2779.

The product of its (nonzero) digits is 7350, while the sum is 30.

The square root of 670557 is about 818.8754484047. The cubic root of 670557 is about 87.5276429668.

The spelling of 670557 in words is "six hundred seventy thousand, five hundred fifty-seven".