30205666 has 8 divisors (see below), whose sum is σ = 45757404. Its totient is φ = 14953200.

The previous prime is 30205639. The next prime is 30205667. The reversal of 30205666 is 66650203.

It can be written as a sum of positive squares in 2 ways, for example, as 25210441 + 4995225 = 5021^2 + 2235^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (30205667) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 74565 + ... + 74968.

Almost surely, 2^30205666 is an apocalyptic number.

30205666 is a deficient number, since it is larger than the sum of its proper divisors (15551738).

30205666 is a wasteful number, since it uses less digits than its factorization.

30205666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 149636.

The product of its (nonzero) digits is 6480, while the sum is 28.

The square root of 30205666 is about 5495.9681585686. The cubic root of 30205666 is about 311.4316920060.

Adding to 30205666 its reverse (66650203), we get a palindrome (96855869).

The spelling of 30205666 in words is "thirty million, two hundred five thousand, six hundred sixty-six".