40663569 has 8 divisors (see below), whose sum is σ = 54247552. Its totient is φ = 27094320.

The previous prime is 40663559. The next prime is 40663577. The reversal of 40663569 is 96536604.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 40663569 - 2⁸ = 40663313 is a prime.

It is a super-2 number, since 2×40663569² = 3307051687635522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40663549) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9027 + ... + 12759.

It is an arithmetic number, because the mean of its divisors is an integer number (6780944).

Almost surely, 2^40663569 is an apocalyptic number.

It is an amenable number.

40663569 is a deficient number, since it is larger than the sum of its proper divisors (13583983).

40663569 is a wasteful number, since it uses less digits than its factorization.

40663569 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7367.

The product of its (nonzero) digits is 116640, while the sum is 39.

The square root of 40663569 is about 6376.7992754986. The cubic root of 40663569 is about 343.8759721661.

The spelling of 40663569 in words is "forty million, six hundred sixty-three thousand, five hundred sixty-nine".