30166681 has 2 divisors, whose sum is σ = 30166682. Its totient is φ = 30166680.

The previous prime is 30166679. The next prime is 30166733. The reversal of 30166681 is 18666103.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 24950025 + 5216656 = 4995^2 + 2284^2 .

It is a cyclic number.

It is not a de Polignac number, because 30166681 - 2¹ = 30166679 is a prime.

It is a super-2 number, since 2×30166681² = 1820057285111522, which contains 22 as substring.

Together with 30166679, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (30166601) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15083340 + 15083341.

It is an arithmetic number, because the mean of its divisors is an integer number (15083341).

Almost surely, 2^30166681 is an apocalyptic number.

It is an amenable number.

30166681 is a deficient number, since it is larger than the sum of its proper divisors (1).

30166681 is an equidigital number, since it uses as much as digits as its factorization.

30166681 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5184, while the sum is 31.

The square root of 30166681 is about 5492.4203225900. The cubic root of 30166681 is about 311.2976510218.

The spelling of 30166681 in words is "thirty million, one hundred sixty-six thousand, six hundred eighty-one".