66030800 has 120 divisors (see below), whose sum is σ = 177592800. Its totient is φ = 23385600.

The previous prime is 66030799. The next prime is 66030823. The reversal of 66030800 is 803066.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 189026 + ... + 189374.

It is an arithmetic number, because the mean of its divisors is an integer number (1479940).

Almost surely, 2^66030800 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 66030800, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (88796400).

66030800 is an abundant number, since it is smaller than the sum of its proper divisors (111562000).

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

66030800 is a wasteful number, since it uses less digits than its factorization.

66030800 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 421 (or 410 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 23.

The square root of 66030800 is about 8125.9337924943. The cubic root of 66030800 is about 404.1868560196.

Adding to 66030800 its reverse (803066), we get a palindrome (66833866).

The spelling of 66030800 in words is "sixty-six million, thirty thousand, eight hundred".