42166643 has 8 divisors (see below), whose sum is σ = 45586320. Its totient is φ = 38867040.

The previous prime is 42166627. The next prime is 42166669. The reversal of 42166643 is 34666124.

42166643 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 42166643 - 2⁴ = 42166627 is a prime.

It is not an unprimeable number, because it can be changed into a prime (42166043) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 29288 + ... + 30693.

It is an arithmetic number, because the mean of its divisors is an integer number (5698290).

Almost surely, 2^42166643 is an apocalyptic number.

42166643 is a deficient number, since it is larger than the sum of its proper divisors (3419677).

42166643 is a wasteful number, since it uses less digits than its factorization.

42166643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60037.

The product of its digits is 20736, while the sum is 32.

The square root of 42166643 is about 6493.5847572816. The cubic root of 42166643 is about 348.0617844015.

The spelling of 42166643 in words is "forty-two million, one hundred sixty-six thousand, six hundred forty-three".