40566553 has 2 divisors, whose sum is σ = 40566554. Its totient is φ = 40566552.

The previous prime is 40566551. The next prime is 40566619. The reversal of 40566553 is 35566504.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 40551424 + 15129 = 6368^2 + 123^2 .

It is a cyclic number.

It is not a de Polignac number, because 40566553 - 2¹ = 40566551 is a prime.

Together with 40566551, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (40566551) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20283276 + 20283277.

It is an arithmetic number, because the mean of its divisors is an integer number (20283277).

Almost surely, 2^40566553 is an apocalyptic number.

It is an amenable number.

40566553 is a deficient number, since it is larger than the sum of its proper divisors (1).

40566553 is an equidigital number, since it uses as much as digits as its factorization.

40566553 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 54000, while the sum is 34.

The square root of 40566553 is about 6369.1877818133. The cubic root of 40566553 is about 343.6022788754.

It can be divided in two parts, 4056 and 6553, that added together give a square (10609 = 103²).

The spelling of 40566553 in words is "forty million, five hundred sixty-six thousand, five hundred fifty-three".