667459388 has 12 divisors (see below), whose sum is σ = 1205733312. Its totient is φ = 322964160.

The previous prime is 667459349. The next prime is 667459433. The reversal of 667459388 is 883954766.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 2691245 + ... + 2691492.

It is an arithmetic number, because the mean of its divisors is an integer number (100477776).

Almost surely, 2^667459388 is an apocalyptic number.

It is an amenable number.

667459388 is a deficient number, since it is larger than the sum of its proper divisors (538273924).

667459388 is a wasteful number, since it uses less digits than its factorization.

667459388 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5382772 (or 5382770 counting only the distinct ones).

The product of its digits is 8709120, while the sum is 56.

The square root of 667459388 is about 25835.2353966439. The cubic root of 667459388 is about 873.9265805212.

The spelling of 667459388 in words is "six hundred sixty-seven million, four hundred fifty-nine thousand, three hundred eighty-eight".