3220661760 has 160 divisors (see below), whose sum is σ = 10374594912. Its totient is φ = 852295680.

The previous prime is 3220661753. The next prime is 3220661761. The reversal of 3220661760 is 671660223.

It is a tau number, because it is divible by the number of its divisors (160).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3220661761) 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, 1050630 + ... + 1053690.

Almost surely, 2^3220661760 is an apocalyptic number.

3220661760 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 3220661760, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (5187297456).

3220661760 is an abundant number, since it is smaller than the sum of its proper divisors (7153933152).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

3220661760 is a wasteful number, since it uses less digits than its factorization.

3220661760 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3224 (or 3208 counting only the distinct ones).

The product of its (nonzero) digits is 18144, while the sum is 33.

The square root of 3220661760 is about 56750.8745307066. The cubic root of 3220661760 is about 1476.7774049702. Note that the first 3 decimals are identical.

The spelling of 3220661760 in words is "three billion, two hundred twenty million, six hundred sixty-one thousand, seven hundred sixty".