672064065 has 24 divisors (see below), whose sum is σ = 1168276200. Its totient is φ = 357398784.

The previous prime is 672064051. The next prime is 672064073. The reversal of 672064065 is 560460276.

672064065 is a `hidden beast` number, since 6 + 7 + 2 + 0 + 640 + 6 + 5 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 129686544 + 542377521 = 11388^2 + 23289^2 .

It is a de Polignac number, because none of the positive numbers 2^k-672064065 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5692 + ... + 37101.

It is an arithmetic number, because the mean of its divisors is an integer number (48678175).

Almost surely, 2^672064065 is an apocalyptic number.

It is an amenable number.

672064065 is a deficient number, since it is larger than the sum of its proper divisors (496212135).

672064065 is a wasteful number, since it uses less digits than its factorization.

672064065 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43153 (or 43150 counting only the distinct ones).

The product of its (nonzero) digits is 60480, while the sum is 36.

The square root of 672064065 is about 25924.1984446964. The cubic root of 672064065 is about 875.9316618048.

The spelling of 672064065 in words is "six hundred seventy-two million, sixty-four thousand, sixty-five".