670618 has 8 divisors (see below), whose sum is σ = 1083348. Its totient is φ = 309504.

The previous prime is 670613. The next prime is 670619. The reversal of 670618 is 816076.

It can be written as a sum of positive squares in 2 ways, for example, as 543169 + 127449 = 737^2 + 357^2 .

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

It is not an unprimeable number, because it can be changed into a prime (670613) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12871 + ... + 12922.

2⁶⁷⁰⁶¹⁸ is an apocalyptic number.

670618 is a deficient number, since it is larger than the sum of its proper divisors (412730).

670618 is a wasteful number, since it uses less digits than its factorization.

670618 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25808.

The product of its (nonzero) digits is 2016, while the sum is 28.

The square root of 670618 is about 818.9126937592. The cubic root of 670618 is about 87.5302969914.

It can be divided in two parts, 6706 and 18, that added together give a square (6724 = 82²).

The spelling of 670618 in words is "six hundred seventy thousand, six hundred eighteen".