2661320432 has 20 divisors (see below), whose sum is σ = 5380496400. Its totient is φ = 1272805248.

The previous prime is 2661320393. The next prime is 2661320447. The reversal of 2661320432 is 2340231662.

It is a junction number, because it is equal to n+sod(n) for n = 2661320395 and 2661320404.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3615557 + ... + 3616292.

It is an arithmetic number, because the mean of its divisors is an integer number (269024820).

Almost surely, 2^2661320432 is an apocalyptic number.

It is an amenable number.

2661320432 is an abundant number, since it is smaller than the sum of its proper divisors (2719175968).

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

2661320432 is a wasteful number, since it uses less digits than its factorization.

2661320432 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7231880 (or 7231874 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 29.

The square root of 2661320432 is about 51587.9872838629. The cubic root of 2661320432 is about 1385.7952106837.

The spelling of 2661320432 in words is "two billion, six hundred sixty-one million, three hundred twenty thousand, four hundred thirty-two".