30066661 has 2 divisors, whose sum is σ = 30066662. Its totient is φ = 30066660.

The previous prime is 30066643. The next prime is 30066691. The reversal of 30066661 is 16666003.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 19633761 + 10432900 = 4431^2 + 3230^2 .

It is a cyclic number.

It is not a de Polignac number, because 30066661 - 2¹¹ = 30064613 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (30066601) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15033330 + 15033331.

It is an arithmetic number, because the mean of its divisors is an integer number (15033331).

Almost surely, 2^30066661 is an apocalyptic number.

It is an amenable number.

30066661 is a deficient number, since it is larger than the sum of its proper divisors (1).

30066661 is an equidigital number, since it uses as much as digits as its factorization.

30066661 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3888, while the sum is 28.

The square root of 30066661 is about 5483.3074872744. The cubic root of 30066661 is about 310.9532261484.

The spelling of 30066661 in words is "thirty million, sixty-six thousand, six hundred sixty-one".