2011660520 has 32 divisors (see below), whose sum is σ = 4528568520. Its totient is φ = 804249600.

The previous prime is 2011660517. The next prime is 2011660543. The reversal of 2011660520 is 250661102.

It can be written as a sum of positive squares in 4 ways, for example, as 1155864004 + 855796516 = 33998^2 + 29254^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 72620 + ... + 96420.

Almost surely, 2^2011660520 is an apocalyptic number.

2011660520 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2011660520 is an abundant number, since it is smaller than the sum of its proper divisors (2516908000).

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

2011660520 is a wasteful number, since it uses less digits than its factorization.

2011660520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25925 (or 25921 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 23.

The square root of 2011660520 is about 44851.5386581107. The cubic root of 2011660520 is about 1262.3648624429.

The spelling of 2011660520 in words is "two billion, eleven million, six hundred sixty thousand, five hundred twenty".