66325051800 has 1152 divisors, whose sum is σ = 287714918400. Its totient is φ = 13856832000.

The previous prime is 66325051787. The next prime is 66325051823. The reversal of 66325051800 is 815052366.

66325051800 is a `hidden beast` number, since 6 + 632 + 5 + 0 + 5 + 18 + 0 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 287 ways as a sum of consecutive naturals, for example, 200377635 + ... + 200377965.

Almost surely, 2^66325051800 is an apocalyptic number.

66325051800 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 66325051800, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (143857459200).

66325051800 is an abundant number, since it is smaller than the sum of its proper divisors (221389866600).

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

66325051800 is a wasteful number, since it uses less digits than its factorization.

66325051800 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 419 (or 398 counting only the distinct ones).

The product of its (nonzero) digits is 43200, while the sum is 36.

The spelling of 66325051800 in words is "sixty-six billion, three hundred twenty-five million, fifty-one thousand, eight hundred".