670561 has 8 divisors (see below), whose sum is σ = 702464. Its totient is φ = 639360.

The previous prime is 670559. The next prime is 670577. The reversal of 670561 is 165076.

670561 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.

It is a cyclic number.

It is not a de Polignac number, because 670561 - 2¹ = 670559 is a prime.

It is an alternating number because its digits alternate between even and odd.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (670511) 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, 2896 + ... + 3118.

It is an arithmetic number, because the mean of its divisors is an integer number (87808).

2⁶⁷⁰⁵⁶¹ is an apocalyptic number.

It is an amenable number.

670561 is a deficient number, since it is larger than the sum of its proper divisors (31903).

670561 is a wasteful number, since it uses less digits than its factorization.

670561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 351.

The product of its (nonzero) digits is 1260, while the sum is 25.

The square root of 670561 is about 818.8778907749. The cubic root of 670561 is about 87.5278170061.

The spelling of 670561 in words is "six hundred seventy thousand, five hundred sixty-one".