1606666128 has 40 divisors (see below), whose sum is σ = 4158293376. Its totient is φ = 534556800.

The previous prime is 1606666099. The next prime is 1606666151. The reversal of 1606666128 is 8216666061.

It is a self number, because there is not a number n which added to its sum of digits gives 1606666128.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4968 + ... + 56903.

Almost surely, 2^1606666128 is an apocalyptic number.

It is an amenable number.

1606666128 is an abundant number, since it is smaller than the sum of its proper divisors (2551627248).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1606666128 is a wasteful number, since it uses less digits than its factorization.

1606666128 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 62423 (or 62417 counting only the distinct ones).

The product of its (nonzero) digits is 124416, while the sum is 42.

The square root of 1606666128 is about 40083.2399888033. The cubic root of 1606666128 is about 1171.2291677132.

The spelling of 1606666128 in words is "one billion, six hundred six million, six hundred sixty-six thousand, one hundred twenty-eight".