30666013 has 6 divisors (see below), whose sum is σ = 35672766. Its totient is φ = 26285112.

The previous prime is 30666001. The next prime is 30666023. The reversal of 30666013 is 31066603.

It can be written as a sum of positive squares in only one way, i.e., 29888089 + 777924 = 5467^2 + 882^2 .

It is a de Polignac number, because none of the positive numbers 2^k-30666013 is a prime.

It is a Duffinian number.

It is a congruent number.

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 5 ways as a sum of consecutive naturals, for example, 312870 + ... + 312967.

It is an arithmetic number, because the mean of its divisors is an integer number (5945461).

Almost surely, 2^30666013 is an apocalyptic number.

It is an amenable number.

30666013 is a deficient number, since it is larger than the sum of its proper divisors (5006753).

30666013 is an equidigital number, since it uses as much as digits as its factorization.

30666013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 625851 (or 625844 counting only the distinct ones).

The product of its (nonzero) digits is 1944, while the sum is 25.

The square root of 30666013 is about 5537.6902224664. The cubic root of 30666013 is about 313.0058384727.

The spelling of 30666013 in words is "thirty million, six hundred sixty-six thousand, thirteen".