406042066 has 4 divisors (see below), whose sum is σ = 609063102. Its totient is φ = 203021032.

The previous prime is 406042057. The next prime is 406042081. The reversal of 406042066 is 660240604.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 317588041 + 88454025 = 17821^2 + 9405^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 101510515 + ... + 101510518.

Almost surely, 2^406042066 is an apocalyptic number.

406042066 is a deficient number, since it is larger than the sum of its proper divisors (203021036).

406042066 is a wasteful number, since it uses less digits than its factorization.

406042066 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 203021035.

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

The square root of 406042066 is about 20150.4855028359. The cubic root of 406042066 is about 740.4976358125.

The spelling of 406042066 in words is "four hundred six million, forty-two thousand, sixty-six".