30666065 has 16 divisors (see below), whose sum is σ = 37911888. Its totient is φ = 23801856.

The previous prime is 30666049. The next prime is 30666067. The reversal of 30666065 is 56066603.

It can be written as a sum of positive squares in 8 ways, for example, as 18769 + 30647296 = 137^2 + 5536^2 .

It is a cyclic number.

It is not a de Polignac number, because 30666065 - 2⁴ = 30666049 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (30666067) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 25109 + ... + 26301.

It is an arithmetic number, because the mean of its divisors is an integer number (2369493).

Almost surely, 2^30666065 is an apocalyptic number.

It is an amenable number.

30666065 is a deficient number, since it is larger than the sum of its proper divisors (7245823).

30666065 is a wasteful number, since it uses less digits than its factorization.

30666065 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1348.

The product of its (nonzero) digits is 19440, while the sum is 32.

The square root of 30666065 is about 5537.6949175627. The cubic root of 30666065 is about 313.0060153927.

The spelling of 30666065 in words is "thirty million, six hundred sixty-six thousand, sixty-five".