672520565 has 4 divisors (see below), whose sum is σ = 807024684. Its totient is φ = 538016448.

The previous prime is 672520543. The next prime is 672520567. The reversal of 672520565 is 565025276.

672520565 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 276590161 + 395930404 = 16631^2 + 19898^2 .

It is a cyclic number.

It is not a de Polignac number, because 672520565 - 2⁸ = 672520309 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 (672520567) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 67252052 + ... + 67252061.

It is an arithmetic number, because the mean of its divisors is an integer number (201756171).

Almost surely, 2^672520565 is an apocalyptic number.

It is an amenable number.

672520565 is a deficient number, since it is larger than the sum of its proper divisors (134504119).

672520565 is a wasteful number, since it uses less digits than its factorization.

672520565 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 134504118.

The product of its (nonzero) digits is 126000, while the sum is 38.

The square root of 672520565 is about 25933.0014653144. The cubic root of 672520565 is about 876.1299426547.

The spelling of 672520565 in words is "six hundred seventy-two million, five hundred twenty thousand, five hundred sixty-five".