667888888 has 8 divisors (see below), whose sum is σ = 1252291680. Its totient is φ = 333944440.

The previous prime is 667888883. The next prime is 667888901. The reversal of 667888888 is 888888766.

It is a tau number, because it is divible by the number of its divisors (8).

It is a plaindrome in base 10.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (667888883) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41743048 + ... + 41743063.

It is an arithmetic number, because the mean of its divisors is an integer number (156536460).

Almost surely, 2^667888888 is an apocalyptic number.

It is an amenable number.

667888888 is a deficient number, since it is larger than the sum of its proper divisors (584402792).

667888888 is a wasteful number, since it uses less digits than its factorization.

667888888 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 83486117 (or 83486113 counting only the distinct ones).

The product of its digits is 66060288, while the sum is 67.

The square root of 667888888 is about 25843.5463510719. The cubic root of 667888888 is about 874.1139931643.

The spelling of 667888888 in words is "six hundred sixty-seven million, eight hundred eighty-eight thousand, eight hundred eighty-eight".