66034423800 has 336 divisors, whose sum is σ = 231084770640. Its totient is φ = 17540789760.

The previous prime is 66034423789. The next prime is 66034423817. The reversal of 66034423800 is 832443066.

It is a happy number.

66034423800 is a `hidden beast` number, since 6 + 603 + 4 + 42 + 3 + 8 + 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 83 ways as a sum of consecutive naturals, for example, 45634677 + ... + 45636123.

Almost surely, 2^66034423800 is an apocalyptic number.

66034423800 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 66034423800, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (115542385320).

66034423800 is an abundant number, since it is smaller than the sum of its proper divisors (165050346840).

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

66034423800 is a wasteful number, since it uses less digits than its factorization.

66034423800 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1794 (or 1770 counting only the distinct ones).

The product of its (nonzero) digits is 82944, while the sum is 36.

Adding to 66034423800 its reverse (832443066), we get a palindrome (66866866866).

The spelling of 66034423800 in words is "sixty-six billion, thirty-four million, four hundred twenty-three thousand, eight hundred".