42004666 has 12 divisors (see below), whose sum is σ = 69256026. Its totient is φ = 19092920.

The previous prime is 42004663. The next prime is 42004681. The reversal of 42004666 is 66640024.

It can be written as a sum of positive squares in only one way, i.e., 41977441 + 27225 = 6479^2 + 165^2 .

It is not an unprimeable number, because it can be changed into a prime (42004663) 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 5 ways as a sum of consecutive naturals, for example, 86545 + ... + 87028.

Almost surely, 2^42004666 is an apocalyptic number.

42004666 is a deficient number, since it is larger than the sum of its proper divisors (27251360).

42004666 is a wasteful number, since it uses less digits than its factorization.

42004666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 173597 (or 173586 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 28.

The square root of 42004666 is about 6481.1006781256. The cubic root of 42004666 is about 347.6155363456.

The spelling of 42004666 in words is "forty-two million, four thousand, six hundred sixty-six".