4102521661 has 32 divisors (see below), whose sum is σ = 4976640000. Its totient is φ = 3306145920.

The previous prime is 4102521653. The next prime is 4102521691. The reversal of 4102521661 is 1661252014.

4102521661 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 4102521661 - 2³ = 4102521653 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4102521691) 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 31 ways as a sum of consecutive naturals, for example, 2736090 + ... + 2737588.

It is an arithmetic number, because the mean of its divisors is an integer number (155520000).

Almost surely, 2^4102521661 is an apocalyptic number.

It is an amenable number.

4102521661 is a deficient number, since it is larger than the sum of its proper divisors (874118339).

4102521661 is a wasteful number, since it uses less digits than its factorization.

4102521661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1809.

The product of its (nonzero) digits is 2880, while the sum is 28.

The square root of 4102521661 is about 64050.9302118244. The cubic root of 4102521661 is about 1600.8487243217.

Adding to 4102521661 its reverse (1661252014), we get a palindrome (5763773675).

The spelling of 4102521661 in words is "four billion, one hundred two million, five hundred twenty-one thousand, six hundred sixty-one".