30666025 has 24 divisors (see below), whose sum is σ = 41280344. Its totient is φ = 22464000.

The previous prime is 30666023. The next prime is 30666029. The reversal of 30666025 is 52066603.

It can be written as a sum of positive squares in 12 ways, for example, as 11209104 + 19456921 = 3348^2 + 4411^2 .

It is not a de Polignac number, because 30666025 - 2¹ = 30666023 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 30665984 and 30666002.

It is not an unprimeable number, because it can be changed into a prime (30666023) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 50725 + ... + 51325.

Almost surely, 2^30666025 is an apocalyptic number.

It is an amenable number.

30666025 is a deficient number, since it is larger than the sum of its proper divisors (10614319).

30666025 is a wasteful number, since it uses less digits than its factorization.

30666025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 781 (or 776 counting only the distinct ones).

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

The square root of 30666025 is about 5537.6913059505. The cubic root of 30666025 is about 313.0058793004.

The spelling of 30666025 in words is "thirty million, six hundred sixty-six thousand, twenty-five".