672816005 has 4 divisors (see below), whose sum is σ = 807379212. Its totient is φ = 538252800.

The previous prime is 672815989. The next prime is 672816013. The reversal of 672816005 is 500618276.

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

It can be written as a sum of positive squares in 2 ways, for example, as 266309761 + 406506244 = 16319^2 + 20162^2 .

It is not a de Polignac number, because 672816005 - 2⁴ = 672815989 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 67281596 + ... + 67281605.

It is an arithmetic number, because the mean of its divisors is an integer number (201844803).

Almost surely, 2^672816005 is an apocalyptic number.

It is an amenable number.

672816005 is a deficient number, since it is larger than the sum of its proper divisors (134563207).

672816005 is a wasteful number, since it uses less digits than its factorization.

672816005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 134563206.

The product of its (nonzero) digits is 20160, while the sum is 35.

The square root of 672816005 is about 25938.6970567143. The cubic root of 672816005 is about 876.2582192455.

The spelling of 672816005 in words is "six hundred seventy-two million, eight hundred sixteen thousand, five".