30666645 has 12 divisors (see below), whose sum is σ = 53155596. Its totient is φ = 16355520.

The previous prime is 30666619. The next prime is 30666667. The reversal of 30666645 is 54666603.

It can be written as a sum of positive squares in 2 ways, for example, as 20439441 + 10227204 = 4521^2 + 3198^2 .

It is not a de Polignac number, because 30666645 - 2¹⁴ = 30650261 is a prime.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

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 11 ways as a sum of consecutive naturals, for example, 340696 + ... + 340785.

It is an arithmetic number, because the mean of its divisors is an integer number (4429633).

Almost surely, 2^30666645 is an apocalyptic number.

It is an amenable number.

30666645 is a deficient number, since it is larger than the sum of its proper divisors (22488951).

30666645 is a wasteful number, since it uses less digits than its factorization.

30666645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 681492 (or 681489 counting only the distinct ones).

The product of its (nonzero) digits is 77760, while the sum is 36.

The square root of 30666645 is about 5537.7472856749. The cubic root of 30666645 is about 313.0079887178.

The spelling of 30666645 in words is "thirty million, six hundred sixty-six thousand, six hundred forty-five".