30810661 has 16 divisors (see below), whose sum is σ = 36784000. Its totient is φ = 25782624.

The previous prime is 30810653. The next prime is 30810671. The reversal of 30810661 is 16601803.

It is not a de Polignac number, because 30810661 - 2³ = 30810653 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 (30810641) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13705 + ... + 15793.

It is an arithmetic number, because the mean of its divisors is an integer number (2299000).

Almost surely, 2^30810661 is an apocalyptic number.

It is an amenable number.

30810661 is a deficient number, since it is larger than the sum of its proper divisors (5973339).

30810661 is an equidigital number, since it uses as much as digits as its factorization.

30810661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2153 (or 2139 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 25.

The square root of 30810661 is about 5550.7351765329. The cubic root of 30810661 is about 313.4972040311.

The spelling of 30810661 in words is "thirty million, eight hundred ten thousand, six hundred sixty-one".