66021214600 has 384 divisors, whose sum is σ = 178381440000. Its totient is φ = 22505472000.

The previous prime is 66021214591. The next prime is 66021214601. The reversal of 66021214600 is 641212066.

It is not an unprimeable number, because it can be changed into a prime (66021214601) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 443095326 + ... + 443095474.

It is an arithmetic number, because the mean of its divisors is an integer number (464535000).

Almost surely, 2^66021214600 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 66021214600, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (89190720000).

66021214600 is an abundant number, since it is smaller than the sum of its proper divisors (112360225400).

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

66021214600 is a wasteful number, since it uses less digits than its factorization.

66021214600 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 369 (or 360 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 28.

Adding to 66021214600 its reverse (641212066), we get a palindrome (66662426666).

The spelling of 66021214600 in words is "sixty-six billion, twenty-one million, two hundred fourteen thousand, six hundred".