30020666 has 16 divisors (see below), whose sum is σ = 49162344. Its totient is φ = 13665024.

The previous prime is 30020663. The next prime is 30020677. The reversal of 30020666 is 66602003.

It can be written as a sum of positive squares in 4 ways, for example, as 26884225 + 3136441 = 5185^2 + 1771^2 .

It is not an unprimeable number, because it can be changed into a prime (30020663) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6011 + ... + 9806.

Almost surely, 2^30020666 is an apocalyptic number.

30020666 is a deficient number, since it is larger than the sum of its proper divisors (19141678).

30020666 is a wasteful number, since it uses less digits than its factorization.

30020666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15905.

The product of its (nonzero) digits is 1296, while the sum is 23.

The square root of 30020666 is about 5479.1117893323. Note that the first 3 decimals coincide. The cubic root of 30020666 is about 310.7945831816.

Adding to 30020666 its reverse (66602003), we get a palindrome (96622669).

The spelling of 30020666 in words is "thirty million, twenty thousand, six hundred sixty-six".