667845964800 has 1584 divisors, whose sum is σ = 2874754396800. Its totient is φ = 144919756800.

The previous prime is 667845964781. The next prime is 667845964813. The reversal of 667845964800 is 8469548766.

667845964800 is a `hidden beast` number, since 6 + 67 + 8 + 4 + 5 + 96 + 480 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 143 ways as a sum of consecutive naturals, for example, 5098060735 + ... + 5098060865.

It is an arithmetic number, because the mean of its divisors is an integer number (1814870200).

Almost surely, 2^667845964800 is an apocalyptic number.

667845964800 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 667845964800, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1437377198400).

667845964800 is an abundant number, since it is smaller than the sum of its proper divisors (2206908432000).

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

667845964800 is a wasteful number, since it uses less digits than its factorization.

667845964800 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 312 (or 286 counting only the distinct ones).

The product of its (nonzero) digits is 69672960, while the sum is 63.

The spelling of 667845964800 in words is "six hundred sixty-seven billion, eight hundred forty-five million, nine hundred sixty-four thousand, eight hundred".