40663783 has 4 divisors (see below), whose sum is σ = 40678528. Its totient is φ = 40649040.

The previous prime is 40663751. The next prime is 40663787. The reversal of 40663783 is 38736604.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 40663783 - 2⁵ = 40663751 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40663787) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1863 + ... + 9208.

It is an arithmetic number, because the mean of its divisors is an integer number (10169632).

Almost surely, 2^40663783 is an apocalyptic number.

40663783 is a deficient number, since it is larger than the sum of its proper divisors (14745).

40663783 is a wasteful number, since it uses less digits than its factorization.

40663783 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14744.

The product of its (nonzero) digits is 72576, while the sum is 37.

The square root of 40663783 is about 6376.8160550544. The cubic root of 40663783 is about 343.8765754033.

The spelling of 40663783 in words is "forty million, six hundred sixty-three thousand, seven hundred eighty-three".