30666666 has 16 divisors (see below), whose sum is σ = 62373600. Its totient is φ = 10048848.

The previous prime is 30666619. The next prime is 30666667. The reversal of 30666666 is 66666603.

30666666 is a modest number, since divided by 6666 gives 3066 as remainder.

It is not an unprimeable number, because it can be changed into a prime (30666667) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 42961 + ... + 43668.

It is an arithmetic number, because the mean of its divisors is an integer number (3898350).

Almost surely, 2^30666666 is an apocalyptic number.

30666666 is an abundant number, since it is smaller than the sum of its proper divisors (31706934).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

30666666 is a wasteful number, since it uses less digits than its factorization.

30666666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 86693.

The product of its (nonzero) digits is 139968, while the sum is 39.

The square root of 30666666 is about 5537.7491817525. The cubic root of 30666666 is about 313.0080601653.

The spelling of 30666666 in words is "thirty million, six hundred sixty-six thousand, six hundred sixty-six".