40566565 has 16 divisors (see below), whose sum is σ = 52634736. Its totient is φ = 29836800.

The previous prime is 40566553. The next prime is 40566619. The reversal of 40566565 is 56566504.

It can be written as a sum of positive squares in 8 ways, for example, as 294849 + 40271716 = 543^2 + 6346^2 .

It is not a de Polignac number, because 40566565 - 2¹³ = 40558373 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 17155 + ... + 19375.

It is an arithmetic number, because the mean of its divisors is an integer number (3289671).

Almost surely, 2^40566565 is an apocalyptic number.

It is an amenable number.

40566565 is a deficient number, since it is larger than the sum of its proper divisors (12068171).

40566565 is a wasteful number, since it uses less digits than its factorization.

40566565 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2520.

The product of its (nonzero) digits is 108000, while the sum is 37.

The square root of 40566565 is about 6369.1887238486. The cubic root of 40566565 is about 343.6023127557.

It can be divided in two parts, 405665 and 65, that multiplied together give a square (26368225 = 5135²).

The spelling of 40566565 in words is "forty million, five hundred sixty-six thousand, five hundred sixty-five".