8428406066 has 4 divisors (see below), whose sum is σ = 12642609102. Its totient is φ = 4214203032.

The previous prime is 8428406033. The next prime is 8428406093. The reversal of 8428406066 is 6606048248.

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., 7648377025 + 780029041 = 87455^2 + 27929^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2107101515 + ... + 2107101518.

Almost surely, 2^8428406066 is an apocalyptic number.

8428406066 is a deficient number, since it is larger than the sum of its proper divisors (4214203036).

8428406066 is a wasteful number, since it uses less digits than its factorization.

8428406066 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4214203035.

The product of its (nonzero) digits is 442368, while the sum is 44.

The square root of 8428406066 is about 91806.3509023205. The cubic root of 8428406066 is about 2035.0815499761.

The spelling of 8428406066 in words is "eight billion, four hundred twenty-eight million, four hundred six thousand, sixty-six".