65564427 has 16 divisors (see below), whose sum is σ = 92806560. Its totient is φ = 41029632.

The previous prime is 65564381. The next prime is 65564441. The reversal of 65564427 is 72446556.

It is not a de Polignac number, because 65564427 - 2¹² = 65560331 is a prime.

It is not an unprimeable number, because it can be changed into a prime (65564627) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 20599 + ... + 23567.

It is an arithmetic number, because the mean of its divisors is an integer number (5800410).

Almost surely, 2^65564427 is an apocalyptic number.

65564427 is a deficient number, since it is larger than the sum of its proper divisors (27242133).

65564427 is a wasteful number, since it uses less digits than its factorization.

65564427 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3422.

The product of its digits is 201600, while the sum is 39.

The square root of 65564427 is about 8097.1863631758. The cubic root of 65564427 is about 403.2330214456.

The spelling of 65564427 in words is "sixty-five million, five hundred sixty-four thousand, four hundred twenty-seven".