66011062400 has 96 divisors (see below), whose sum is σ = 163149714000. Its totient is φ = 26391188480.

The previous prime is 66011062367. The next prime is 66011062427. The reversal of 66011062400 is 426011066.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 66011062400.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 8632979 + ... + 8640621.

Almost surely, 2^66011062400 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 66011062400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (81574857000).

66011062400 is an abundant number, since it is smaller than the sum of its proper divisors (97138651600).

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

66011062400 is a wasteful number, since it uses less digits than its factorization.

66011062400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10366 (or 10349 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 26.

Adding to 66011062400 its reverse (426011066), we get a palindrome (66437073466).

The spelling of 66011062400 in words is "sixty-six billion, eleven million, sixty-two thousand, four hundred".