670806442 has 8 divisors (see below), whose sum is σ = 1006975332. Its totient is φ = 335148000.

The previous prime is 670806403. The next prime is 670806443. The reversal of 670806442 is 244608076.

It can be written as a sum of positive squares in 2 ways, for example, as 512071641 + 158734801 = 22629^2 + 12599^2 .

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 (670806443) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 124309 + ... + 129592.

Almost surely, 2^670806442 is an apocalyptic number.

670806442 is a deficient number, since it is larger than the sum of its proper divisors (336168890).

670806442 is a wasteful number, since it uses less digits than its factorization.

670806442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 255224.

The product of its (nonzero) digits is 64512, while the sum is 37.

The square root of 670806442 is about 25899.9313126502. The cubic root of 670806442 is about 875.3849482262.

The spelling of 670806442 in words is "six hundred seventy million, eight hundred six thousand, four hundred forty-two".