40663481 has 8 divisors (see below), whose sum is σ = 43203720. Its totient is φ = 38199168.

The previous prime is 40663459. The next prime is 40663487. The reversal of 40663481 is 18436604.

It can be written as a sum of positive squares in 4 ways, for example, as 3258025 + 37405456 = 1805^2 + 6116^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 40663481 - 2¹⁴ = 40647097 is a prime.

It is a super-2 number, since 2×40663481² = 3307037374074722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40663487) 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, 17876 + ... + 20021.

It is an arithmetic number, because the mean of its divisors is an integer number (5400465).

Almost surely, 2^40663481 is an apocalyptic number.

It is an amenable number.

40663481 is a deficient number, since it is larger than the sum of its proper divisors (2540239).

40663481 is a wasteful number, since it uses less digits than its factorization.

40663481 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37963.

The product of its (nonzero) digits is 13824, while the sum is 32.

The square root of 40663481 is about 6376.7923754816. The cubic root of 40663481 is about 343.8757241054.

The spelling of 40663481 in words is "forty million, six hundred sixty-three thousand, four hundred eighty-one".