3220337661 has 32 divisors (see below), whose sum is σ = 4529779968. Its totient is φ = 2032335360.

The previous prime is 3220337657. The next prime is 3220337671. The reversal of 3220337661 is 1667330223.

It is not a de Polignac number, because 3220337661 - 2² = 3220337657 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3220337621) 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, 2215611 + ... + 2217063.

It is an arithmetic number, because the mean of its divisors is an integer number (141555624).

Almost surely, 2^3220337661 is an apocalyptic number.

It is an amenable number.

3220337661 is a deficient number, since it is larger than the sum of its proper divisors (1309442307).

3220337661 is a wasteful number, since it uses less digits than its factorization.

3220337661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2021.

The product of its (nonzero) digits is 27216, while the sum is 33.

The square root of 3220337661 is about 56748.0190050719. The cubic root of 3220337661 is about 1476.7278666898.

Adding to 3220337661 its reverse (1667330223), we get a palindrome (4887667884).

The spelling of 3220337661 in words is "three billion, two hundred twenty million, three hundred thirty-seven thousand, six hundred sixty-one".