66330220 has 24 divisors (see below), whose sum is σ = 151957008. Its totient is φ = 24120000.

The previous prime is 66330211. The next prime is 66330239. The reversal of 66330220 is 2203366.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is a junction number, because it is equal to n+sod(n) for n = 66330191 and 66330200.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 150531 + ... + 150970.

It is an arithmetic number, because the mean of its divisors is an integer number (6331542).

Almost surely, 2^66330220 is an apocalyptic number.

It is an amenable number.

66330220 is an abundant number, since it is smaller than the sum of its proper divisors (85626788).

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

66330220 is a wasteful number, since it uses less digits than its factorization.

66330220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 301521 (or 301519 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 22.

The square root of 66330220 is about 8144.3366826280. The cubic root of 66330220 is about 404.7968701425.

Adding to 66330220 its reverse (2203366), we get a palindrome (68533586).

The spelling of 66330220 in words is "sixty-six million, three hundred thirty thousand, two hundred twenty".