2665705620 has 48 divisors (see below), whose sum is σ = 7495246080. Its totient is φ = 707876736.

The previous prime is 2665705613. The next prime is 2665705633. The reversal of 2665705620 is 265075662.

2665705620 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 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, 78607 + ... + 107286.

It is an arithmetic number, because the mean of its divisors is an integer number (156150960).

Almost surely, 2^2665705620 is an apocalyptic number.

2665705620 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2665705620 is an abundant number, since it is smaller than the sum of its proper divisors (4829540460).

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

2665705620 is a wasteful number, since it uses less digits than its factorization.

2665705620 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 186144 (or 186142 counting only the distinct ones).

The product of its (nonzero) digits is 151200, while the sum is 39.

The square root of 2665705620 is about 51630.4718165542. The cubic root of 2665705620 is about 1386.5559405495. Note that the first 3 decimals are identical.

The spelling of 2665705620 in words is "two billion, six hundred sixty-five million, seven hundred five thousand, six hundred twenty".