42406663 has 12 divisors (see below), whose sum is σ = 46708920. Its totient is φ = 38472096.

The previous prime is 42406657. The next prime is 42406709. The reversal of 42406663 is 36660424.

It is not a de Polignac number, because 42406663 - 2²⁵ = 8852231 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 (42409663) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 7845 + ... + 12097.

It is an arithmetic number, because the mean of its divisors is an integer number (3892410).

Almost surely, 2^42406663 is an apocalyptic number.

42406663 is a deficient number, since it is larger than the sum of its proper divisors (4302257).

42406663 is a wasteful number, since it uses less digits than its factorization.

42406663 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4338 (or 4325 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 31.

The square root of 42406663 is about 6512.0398493867. The cubic root of 42406663 is about 348.7209450664.

The spelling of 42406663 in words is "forty-two million, four hundred six thousand, six hundred sixty-three".