6667007409 has 6 divisors (see below), whose sum is σ = 9630121826. Its totient is φ = 4444671600.

The previous prime is 6667007407. The next prime is 6667007441. The reversal of 6667007409 is 9047007666.

It can be written as a sum of positive squares in only one way, i.e., 3335409009 + 3331598400 = 57753^2 + 57720^2 .

It is not a de Polignac number, because 6667007409 - 2¹ = 6667007407 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6667007407) 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 5 ways as a sum of consecutive naturals, for example, 370389292 + ... + 370389309.

Almost surely, 2^6667007409 is an apocalyptic number.

It is an amenable number.

6667007409 is a deficient number, since it is larger than the sum of its proper divisors (2963114417).

6667007409 is a wasteful number, since it uses less digits than its factorization.

6667007409 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 740778607 (or 740778604 counting only the distinct ones).

The product of its (nonzero) digits is 381024, while the sum is 45.

The square root of 6667007409 is about 81651.7446782370. The cubic root of 6667007409 is about 1882.1041222970.

The spelling of 6667007409 in words is "six billion, six hundred sixty-seven million, seven thousand, four hundred nine".