2661653982 has 32 divisors (see below), whose sum is σ = 5736689280. Its totient is φ = 818413920.

The previous prime is 2661653963. The next prime is 2661653999. The reversal of 2661653982 is 2893561662.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 112357 + ... + 133967.

It is an arithmetic number, because the mean of its divisors is an integer number (179271540).

Almost surely, 2^2661653982 is an apocalyptic number.

2661653982 is an abundant number, since it is smaller than the sum of its proper divisors (3075035298).

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

2661653982 is a wasteful number, since it uses less digits than its factorization.

2661653982 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23208.

The product of its digits is 933120, while the sum is 48.

The square root of 2661653982 is about 51591.2200088348. The cubic root of 2661653982 is about 1385.8531033345.

The spelling of 2661653982 in words is "two billion, six hundred sixty-one million, six hundred fifty-three thousand, nine hundred eighty-two".