667904912 has 40 divisors (see below), whose sum is σ = 1362799680. Its totient is φ = 316483200.

The previous prime is 667904899. The next prime is 667904917. The reversal of 667904912 is 219409766.

It is not an unprimeable number, because it can be changed into a prime (667904917) 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 7 ways as a sum of consecutive naturals, for example, 31787 + ... + 48437.

It is an arithmetic number, because the mean of its divisors is an integer number (34069992).

Almost surely, 2^667904912 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 667904912, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (681399840).

667904912 is an abundant number, since it is smaller than the sum of its proper divisors (694894768).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

667904912 is a wasteful number, since it uses less digits than its factorization.

667904912 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16791 (or 16785 counting only the distinct ones).

The product of its (nonzero) digits is 163296, while the sum is 44.

The square root of 667904912 is about 25843.8563685840. The cubic root of 667904912 is about 874.1209836936.

The spelling of 667904912 in words is "six hundred sixty-seven million, nine hundred four thousand, nine hundred twelve".