2661082140 has 96 divisors (see below), whose sum is σ = 7581530880. Its totient is φ = 697268736.

The previous prime is 2661082093. The next prime is 2661082157. The reversal of 2661082140 is 412801662.

2661082140 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 2661082098 and 2661082107.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1343671 + ... + 1345649.

It is an arithmetic number, because the mean of its divisors is an integer number (78974280).

Almost surely, 2^2661082140 is an apocalyptic number.

2661082140 is a gapful number since it is divisible by the number (20) 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 2661082140, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3790765440).

2661082140 is an abundant number, since it is smaller than the sum of its proper divisors (4920448740).

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

2661082140 is a wasteful number, since it uses less digits than its factorization.

2661082140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2371 (or 2369 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 30.

The square root of 2661082140 is about 51585.6776634755. The cubic root of 2661082140 is about 1385.7538485382.

The spelling of 2661082140 in words is "two billion, six hundred sixty-one million, eighty-two thousand, one hundred forty".