670066813 has 16 divisors (see below), whose sum is σ = 740534256. Its totient is φ = 602357760.

The previous prime is 670066783. The next prime is 670066823. The reversal of 670066813 is 318660076.

It can be written as a sum of positive squares in 8 ways, for example, as 44916804 + 625150009 = 6702^2 + 25003^2 .

It is a cyclic number.

It is not a de Polignac number, because 670066813 - 2⁹ = 670066301 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (670066823) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 549981 + ... + 551197.

It is an arithmetic number, because the mean of its divisors is an integer number (46283391).

Almost surely, 2^670066813 is an apocalyptic number.

It is an amenable number.

670066813 is a deficient number, since it is larger than the sum of its proper divisors (70467443).

670066813 is a wasteful number, since it uses less digits than its factorization.

670066813 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2304.

The product of its (nonzero) digits is 36288, while the sum is 37.

The square root of 670066813 is about 25885.6487846065. The cubic root of 670066813 is about 875.0630977083.

The spelling of 670066813 in words is "six hundred seventy million, sixty-six thousand, eight hundred thirteen".