42166906 has 16 divisors (see below), whose sum is σ = 64800000. Its totient is φ = 20571408.

The previous prime is 42166897. The next prime is 42166907. The reversal of 42166906 is 60966124.

42166906 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×42166906² = 3556095923225672, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (42166907) 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, 20095 + ... + 22093.

It is an arithmetic number, because the mean of its divisors is an integer number (4050000).

Almost surely, 2^42166906 is an apocalyptic number.

42166906 is a deficient number, since it is larger than the sum of its proper divisors (22633094).

42166906 is a wasteful number, since it uses less digits than its factorization.

42166906 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2253.

The product of its (nonzero) digits is 15552, while the sum is 34.

The square root of 42166906 is about 6493.6050080060. The cubic root of 42166906 is about 348.0625080388.

The spelling of 42166906 in words is "forty-two million, one hundred sixty-six thousand, nine hundred six".