66210030 has 48 divisors (see below), whose sum is σ = 172645200. Its totient is φ = 17604864.

The previous prime is 66209999. The next prime is 66210047. The reversal of 66210030 is 3001266.

It is a happy number.

66210030 is a `hidden beast` number, since 662 + 1 + 0 + 0 + 3 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 66209985 and 66210012.

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, 38121 + ... + 39819.

It is an arithmetic number, because the mean of its divisors is an integer number (3596775).

Almost surely, 2^66210030 is an apocalyptic number.

66210030 is an abundant number, since it is smaller than the sum of its proper divisors (106435170).

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

66210030 is a wasteful number, since it uses less digits than its factorization.

66210030 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2145 (or 2142 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

The square root of 66210030 is about 8136.9545900171. The cubic root of 66210030 is about 404.5522257382.

Adding to 66210030 its reverse (3001266), we get a palindrome (69211296).

The spelling of 66210030 in words is "sixty-six million, two hundred ten thousand, thirty".