2075756721 has 8 divisors (see below), whose sum is σ = 2842477824. Its totient is φ = 1346436720.

The previous prime is 2075756717. The next prime is 2075756743. The reversal of 2075756721 is 1276575702.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 2075756721 - 2² = 2075756717 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2075756021) by changing a digit.

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, 9350145 + ... + 9350366.

It is an arithmetic number, because the mean of its divisors is an integer number (355309728).

Almost surely, 2^2075756721 is an apocalyptic number.

It is an amenable number.

2075756721 is a deficient number, since it is larger than the sum of its proper divisors (766721103).

2075756721 is a wasteful number, since it uses less digits than its factorization.

2075756721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18700551.

The product of its (nonzero) digits is 205800, while the sum is 42.

The square root of 2075756721 is about 45560.4732306415. The cubic root of 2075756721 is about 1275.6322320806.

The spelling of 2075756721 in words is "two billion, seventy-five million, seven hundred fifty-six thousand, seven hundred twenty-one".