42666844 has 24 divisors (see below), whose sum is σ = 82269936. Its totient is φ = 19200000.

The previous prime is 42666829. The next prime is 42666847. The reversal of 42666844 is 44866624.

It is a junction number, because it is equal to n+sod(n) for n = 42666797 and 42666806.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42666847) 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, 357 + ... + 9244.

It is an arithmetic number, because the mean of its divisors is an integer number (3427914).

Almost surely, 2^42666844 is an apocalyptic number.

42666844 is a gapful number since it is divisible by the number (44) formed by its first and last digit.

It is an amenable number.

42666844 is a deficient number, since it is larger than the sum of its proper divisors (39603092).

42666844 is a wasteful number, since it uses less digits than its factorization.

42666844 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9717 (or 9715 counting only the distinct ones).

The product of its digits is 221184, while the sum is 40.

The square root of 42666844 is about 6531.9862216634. The cubic root of 42666844 is about 349.4326700030.

The spelling of 42666844 in words is "forty-two million, six hundred sixty-six thousand, eight hundred forty-four".