667073707009 has 8 divisors (see below), whose sum is σ = 692761377960. Its totient is φ = 641565044736.

The previous prime is 667073707007. The next prime is 667073707031. The reversal of 667073707009 is 900707370766.

It can be written as a sum of positive squares in 4 ways, for example, as 196164839025 + 470908867984 = 442905^2 + 686228^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 667073707009 - 2¹ = 667073707007 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (667073707007) 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 7 ways as a sum of consecutive naturals, for example, 44744574 + ... + 44759479.

It is an arithmetic number, because the mean of its divisors is an integer number (86595172245).

Almost surely, 2^667073707009 is an apocalyptic number.

It is an amenable number.

667073707009 is a deficient number, since it is larger than the sum of its proper divisors (25687670951).

667073707009 is a wasteful number, since it uses less digits than its factorization.

667073707009 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 89504339.

The product of its (nonzero) digits is 2333772, while the sum is 52.

The spelling of 667073707009 in words is "six hundred sixty-seven billion, seventy-three million, seven hundred seven thousand, nine".