40663405 has 16 divisors (see below), whose sum is σ = 51838704. Its totient is φ = 30515200.

The previous prime is 40663391. The next prime is 40663411. The reversal of 40663405 is 50436604.

It can be written as a sum of positive squares in 8 ways, for example, as 6953769 + 33709636 = 2637^2 + 5806^2 .

It is a de Polignac number, because none of the positive numbers 2^k-40663405 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, 33489 + ... + 34681.

It is an arithmetic number, because the mean of its divisors is an integer number (3239919).

Almost surely, 2^40663405 is an apocalyptic number.

It is an amenable number.

40663405 is a deficient number, since it is larger than the sum of its proper divisors (11175299).

40663405 is a wasteful number, since it uses less digits than its factorization.

40663405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1616.

The product of its (nonzero) digits is 8640, while the sum is 28.

The square root of 40663405 is about 6376.7864163699. The cubic root of 40663405 is about 343.8755098708.

The spelling of 40663405 in words is "forty million, six hundred sixty-three thousand, four hundred five".