3220730665 has 32 divisors (see below), whose sum is σ = 4156116480. Its totient is φ = 2387404800.

The previous prime is 3220730663. The next prime is 3220730693. The reversal of 3220730665 is 5660370223.

It is not a de Polignac number, because 3220730665 - 2¹ = 3220730663 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 3220730665.

It is not an unprimeable number, because it can be changed into a prime (3220730663) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2049330 + ... + 2050900.

It is an arithmetic number, because the mean of its divisors is an integer number (129878640).

Almost surely, 2^3220730665 is an apocalyptic number.

It is an amenable number.

3220730665 is a deficient number, since it is larger than the sum of its proper divisors (935385815).

3220730665 is a wasteful number, since it uses less digits than its factorization.

3220730665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1953.

The product of its (nonzero) digits is 45360, while the sum is 34.

The square root of 3220730665 is about 56751.4816106152. The cubic root of 3220730665 is about 1476.7879366175.

The spelling of 3220730665 in words is "three billion, two hundred twenty million, seven hundred thirty thousand, six hundred sixty-five".