30564661 has 4 divisors (see below), whose sum is σ = 30577824. Its totient is φ = 30551500.

The previous prime is 30564659. The next prime is 30564679. The reversal of 30564661 is 16646503.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 16646503 = 23 ⋅723761.

It is a cyclic number.

It is not a de Polignac number, because 30564661 - 2¹ = 30564659 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 (30564601) 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, 2065 + ... + 8086.

It is an arithmetic number, because the mean of its divisors is an integer number (7644456).

Almost surely, 2^30564661 is an apocalyptic number.

It is an amenable number.

30564661 is a deficient number, since it is larger than the sum of its proper divisors (13163).

30564661 is a wasteful number, since it uses less digits than its factorization.

30564661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13162.

The product of its (nonzero) digits is 12960, while the sum is 31.

The square root of 30564661 is about 5528.5315410152. The cubic root of 30564661 is about 312.6606269692.

The spelling of 30564661 in words is "thirty million, five hundred sixty-four thousand, six hundred sixty-one".