666687300 has 144 divisors (see below), whose sum is σ = 2076867072. Its totient is φ = 164505600.

The previous prime is 666687299. The next prime is 666687313. The reversal of 666687300 is 3786666.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors.

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 47 ways as a sum of consecutive naturals, for example, 310029 + ... + 312171.

It is an arithmetic number, because the mean of its divisors is an integer number (14422688).

Almost surely, 2^666687300 is an apocalyptic number.

666687300 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 666687300, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1038433536).

666687300 is an abundant number, since it is smaller than the sum of its proper divisors (1410179772).

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

666687300 is a wasteful number, since it uses less digits than its factorization.

666687300 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2238 (or 2231 counting only the distinct ones).

The product of its (nonzero) digits is 217728, while the sum is 42.

The square root of 666687300 is about 25820.2885344064. The cubic root of 666687300 is about 873.5894770818.

The spelling of 666687300 in words is "six hundred sixty-six million, six hundred eighty-seven thousand, three hundred".