30682661 has 4 divisors (see below), whose sum is σ = 31027500. Its totient is φ = 30337824.

The previous prime is 30682649. The next prime is 30682711. The reversal of 30682661 is 16628603.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 7344100 + 23338561 = 2710^2 + 4831^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-30682661 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30682061) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 172286 + ... + 172463.

It is an arithmetic number, because the mean of its divisors is an integer number (7756875).

Almost surely, 2^30682661 is an apocalyptic number.

It is an amenable number.

30682661 is a deficient number, since it is larger than the sum of its proper divisors (344839).

30682661 is an equidigital number, since it uses as much as digits as its factorization.

30682661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 344838.

The product of its (nonzero) digits is 10368, while the sum is 32.

The square root of 30682661 is about 5539.1931722950. The cubic root of 30682661 is about 313.0624698810.

The spelling of 30682661 in words is "thirty million, six hundred eighty-two thousand, six hundred sixty-one".