6610050721 has 8 divisors (see below), whose sum is σ = 7010305704. Its totient is φ = 6211065600.

The previous prime is 6610050673. The next prime is 6610050731. The reversal of 6610050721 is 1270500166.

It can be written as a sum of positive squares in 4 ways, for example, as 1208535696 + 5401515025 = 34764^2 + 73495^2 .

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

It is not a de Polignac number, because 6610050721 - 2²³ = 6601662113 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 6610050721.

It is not an unprimeable number, because it can be changed into a prime (6610050731) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 306730 + ... + 327571.

It is an arithmetic number, because the mean of its divisors is an integer number (876288213).

Almost surely, 2^6610050721 is an apocalyptic number.

It is an amenable number.

6610050721 is a deficient number, since it is larger than the sum of its proper divisors (400254983).

6610050721 is a wasteful number, since it uses less digits than its factorization.

6610050721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 634931.

The product of its (nonzero) digits is 2520, while the sum is 28.

The square root of 6610050721 is about 81302.2184260676. The cubic root of 6610050721 is about 1876.7291399114.

Adding to 6610050721 its reverse (1270500166), we get a palindrome (7880550887).

The spelling of 6610050721 in words is "six billion, six hundred ten million, fifty thousand, seven hundred twenty-one".