1606566165 has 48 divisors (see below), whose sum is σ = 2702548800. Its totient is φ = 814709760.

The previous prime is 1606566163. The next prime is 1606566167. The reversal of 1606566165 is 5616656061.

It is an interprime number because it is at equal distance from previous prime (1606566163) and next prime (1606566167).

It is not a de Polignac number, because 1606566165 - 2¹ = 1606566163 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1606566163) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 849541 + ... + 851429.

It is an arithmetic number, because the mean of its divisors is an integer number (56303100).

Almost surely, 2^1606566165 is an apocalyptic number.

1606566165 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1606566165 is a deficient number, since it is larger than the sum of its proper divisors (1095982635).

1606566165 is a wasteful number, since it uses less digits than its factorization.

1606566165 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2018 (or 1987 counting only the distinct ones).

The product of its (nonzero) digits is 194400, while the sum is 42.

The square root of 1606566165 is about 40081.9930267945. The cubic root of 1606566165 is about 1171.2048768317.

The spelling of 1606566165 in words is "one billion, six hundred six million, five hundred sixty-six thousand, one hundred sixty-five".