667873863 has 8 divisors (see below), whose sum is σ = 989442800. Its totient is φ = 445249224.

The previous prime is 667873853. The next prime is 667873873. The reversal of 667873863 is 368378766.

It is an interprime number because it is at equal distance from previous prime (667873853) and next prime (667873873).

It is not a de Polignac number, because 667873863 - 2⁵ = 667873831 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 (667873813) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12368008 + ... + 12368061.

It is an arithmetic number, because the mean of its divisors is an integer number (123680350).

Almost surely, 2^667873863 is an apocalyptic number.

667873863 is a deficient number, since it is larger than the sum of its proper divisors (321568937).

667873863 is a wasteful number, since it uses less digits than its factorization.

667873863 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24736078 (or 24736072 counting only the distinct ones).

The product of its digits is 6096384, while the sum is 54.

The square root of 667873863 is about 25843.2556579081. The cubic root of 667873863 is about 874.1074383508.

The spelling of 667873863 in words is "six hundred sixty-seven million, eight hundred seventy-three thousand, eight hundred sixty-three".