1606635680566 has 64 divisors (see below), whose sum is σ = 2910367272960. Its totient is φ = 650318169600.

The previous prime is 1606635680561. The next prime is 1606635680579. The reversal of 1606635680566 is 6650865366061.

It is a self number, because there is not a number n which added to its sum of digits gives 1606635680566.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1606635680561) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 11868270 + ... + 12002878.

It is an arithmetic number, because the mean of its divisors is an integer number (45474488640).

Almost surely, 2^{1606635680566} is an apocalyptic number.

1606635680566 is a deficient number, since it is larger than the sum of its proper divisors (1303731592394).

1606635680566 is a wasteful number, since it uses less digits than its factorization.

1606635680566 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 135109.

The product of its (nonzero) digits is 27993600, while the sum is 58.

The spelling of 1606635680566 in words is "one trillion, six hundred six billion, six hundred thirty-five million, six hundred eighty thousand, five hundred sixty-six".