66633330 has 16 divisors (see below), whose sum is σ = 159920064. Its totient is φ = 17768880.

The previous prime is 66633299. The next prime is 66633341. The reversal of 66633330 is 3333666.

It is a Harshad number since it is a multiple of its sum of digits (30), and also a Moran number because the ratio is a prime number: 2221111 = 66633330 / (6 + 6 + 6 + 3 + 3 + 3 + 3 + 0).

It is a nialpdrome in base 10.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1110526 + ... + 1110585.

It is an arithmetic number, because the mean of its divisors is an integer number (9995004).

Almost surely, 2^66633330 is an apocalyptic number.

66633330 is an abundant number, since it is smaller than the sum of its proper divisors (93286734).

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

66633330 is a wasteful number, since it uses less digits than its factorization.

66633330 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2221121.

The product of its (nonzero) digits is 17496, while the sum is 30.

The square root of 66633330 is about 8162.9241084308. The cubic root of 66633330 is about 405.4125349893.

Adding to 66633330 its reverse (3333666), we get a palindrome (69966996).

The spelling of 66633330 in words is "sixty-six million, six hundred thirty-three thousand, three hundred thirty".