1606056665 has 16 divisors (see below), whose sum is σ = 2001540288. Its totient is φ = 1236223296.

The previous prime is 1606056659. The next prime is 1606056667. The reversal of 1606056665 is 5666506061.

It is a cyclic number.

It is not a de Polignac number, because 1606056665 - 2⁶ = 1606056601 is a prime.

It is a super-2 number, since 2×1606056665² = 5158836022381844450, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1606056667) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 41342 + ... + 70151.

It is an arithmetic number, because the mean of its divisors is an integer number (125096268).

Almost surely, 2^1606056665 is an apocalyptic number.

It is an amenable number.

1606056665 is a deficient number, since it is larger than the sum of its proper divisors (395483623).

1606056665 is a wasteful number, since it uses less digits than its factorization.

1606056665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 111608.

The product of its (nonzero) digits is 194400, while the sum is 41.

The square root of 1606056665 is about 40075.6368009293. The cubic root of 1606056665 is about 1171.0810533233.

The spelling of 1606056665 in words is "one billion, six hundred six million, fifty-six thousand, six hundred sixty-five".