667700000 has 144 divisors (see below), whose sum is σ = 1795385088. Its totient is φ = 242400000.

The previous prime is 667699999. The next prime is 667700003. The reversal of 667700000 is 7766.

It is a zygodrome in base 10.

It is not an unprimeable number, because it can be changed into a prime (667700003) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1099697 + ... + 1100303.

It is an arithmetic number, because the mean of its divisors is an integer number (12467952).

Almost surely, 2^667700000 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 667700000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (897692544).

667700000 is an abundant number, since it is smaller than the sum of its proper divisors (1127685088).

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

667700000 is an equidigital number, since it uses as much as digits as its factorization.

667700000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 653 (or 625 counting only the distinct ones).

The product of its (nonzero) digits is 1764, while the sum is 26.

The square root of 667700000 is about 25839.8916406397. The cubic root of 667700000 is about 874.0315816462.

Adding to 667700000 its reverse (7766), we get a palindrome (667707766).

The spelling of 667700000 in words is "six hundred sixty-seven million, seven hundred thousand".