667115009 has 16 divisors (see below), whose sum is σ = 754114560. Its totient is φ = 584658000.

The previous prime is 667114997. The next prime is 667115021. The reversal of 667115009 is 900511766.

It is an interprime number because it is at equal distance from previous prime (667114997) and next prime (667115021).

It is a cyclic number.

It is not a de Polignac number, because 667115009 - 2⁴ = 667114993 is a prime.

It is a Smith number, since the sum of its digits (35) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 667115009.

It is not an unprimeable number, because it can be changed into a prime (667115089) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 88802 + ... + 96020.

It is an arithmetic number, because the mean of its divisors is an integer number (47132160).

Almost surely, 2^667115009 is an apocalyptic number.

It is an amenable number.

667115009 is a deficient number, since it is larger than the sum of its proper divisors (86999551).

667115009 is a wasteful number, since it uses less digits than its factorization.

667115009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7532.

The product of its (nonzero) digits is 11340, while the sum is 35.

The square root of 667115009 is about 25828.5696274494. The cubic root of 667115009 is about 873.7762524049.

The spelling of 667115009 in words is "six hundred sixty-seven million, one hundred fifteen thousand, nine".