42006866 has 16 divisors (see below), whose sum is σ = 69709248. Its totient is φ = 18824400.

The previous prime is 42006859. The next prime is 42006889. The reversal of 42006866 is 66860024.

It is a happy number.

It is a super-2 number, since 2×42006866² = 3529153582283912, which contains 22 as substring.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 11885 + ... + 15008.

It is an arithmetic number, because the mean of its divisors is an integer number (4356828).

Almost surely, 2^42006866 is an apocalyptic number.

42006866 is a deficient number, since it is larger than the sum of its proper divisors (27702382).

42006866 is a wasteful number, since it uses less digits than its factorization.

42006866 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26977.

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

The square root of 42006866 is about 6481.2704001608. The cubic root of 42006866 is about 347.6216050430.

The spelling of 42006866 in words is "forty-two million, six thousand, eight hundred sixty-six".