40566401 has 2 divisors, whose sum is σ = 40566402. Its totient is φ = 40566400.

The previous prime is 40566397. The next prime is 40566413. The reversal of 40566401 is 10466504.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 33930625 + 6635776 = 5825^2 + 2576^2 .

It is a cyclic number.

It is not a de Polignac number, because 40566401 - 2² = 40566397 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (40566451) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20283200 + 20283201.

It is an arithmetic number, because the mean of its divisors is an integer number (20283201).

Almost surely, 2^40566401 is an apocalyptic number.

It is an amenable number.

40566401 is a deficient number, since it is larger than the sum of its proper divisors (1).

40566401 is an equidigital number, since it uses as much as digits as its factorization.

40566401 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2880, while the sum is 26.

The square root of 40566401 is about 6369.1758493545. The cubic root of 40566401 is about 343.6018497237.

The spelling of 40566401 in words is "forty million, five hundred sixty-six thousand, four hundred one".