670556506 has 4 divisors (see below), whose sum is σ = 1005834762. Its totient is φ = 335278252.

The previous prime is 670556459. The next prime is 670556507. The reversal of 670556506 is 605655076.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 513430281 + 157126225 = 22659^2 + 12535^2 .

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (670556507) 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 as a sum of consecutive naturals, namely, 167639125 + ... + 167639128.

Almost surely, 2^670556506 is an apocalyptic number.

670556506 is a deficient number, since it is larger than the sum of its proper divisors (335278256).

670556506 is a wasteful number, since it uses less digits than its factorization.

670556506 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 335278255.

The product of its (nonzero) digits is 189000, while the sum is 40.

The square root of 670556506 is about 25895.1058310253. The cubic root of 670556506 is about 875.2762147290.

The spelling of 670556506 in words is "six hundred seventy million, five hundred fifty-six thousand, five hundred six".