3216665445 has 16 divisors (see below), whose sum is σ = 5881902720. Its totient is φ = 1470475584.

The previous prime is 3216665443. The next prime is 3216665449. The reversal of 3216665445 is 5445666123.

It is not a de Polignac number, because 3216665445 - 2¹ = 3216665443 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 3216665397 and 3216665406.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3216665443) 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, 15317350 + ... + 15317559.

It is an arithmetic number, because the mean of its divisors is an integer number (367618920).

Almost surely, 2^3216665445 is an apocalyptic number.

3216665445 is a gapful number since it is divisible by the number (35) formed by its first and last digit.

It is an amenable number.

3216665445 is a deficient number, since it is larger than the sum of its proper divisors (2665237275).

3216665445 is a wasteful number, since it uses less digits than its factorization.

3216665445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30634924.

The product of its digits is 518400, while the sum is 42.

The square root of 3216665445 is about 56715.6543204784. The cubic root of 3216665445 is about 1476.1663390029.

The spelling of 3216665445 in words is "three billion, two hundred sixteen million, six hundred sixty-five thousand, four hundred forty-five".