3875988661 has 8 divisors (see below), whose sum is σ = 4141641240. Its totient is φ = 3614519808.

The previous prime is 3875988647. The next prime is 3875988667. The reversal of 3875988661 is 1668895783.

It can be written as a sum of positive squares in 4 ways, for example, as 1716527761 + 2159460900 = 41431^2 + 46470^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 3875988661 - 2⁵ = 3875988629 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 3875988661.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3875988667) 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, 1044016 + ... + 1047721.

It is an arithmetic number, because the mean of its divisors is an integer number (517705155).

Almost surely, 2^3875988661 is an apocalyptic number.

It is an amenable number.

3875988661 is a deficient number, since it is larger than the sum of its proper divisors (265652579).

3875988661 is a wasteful number, since it uses less digits than its factorization.

3875988661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2091863.

The product of its digits is 17418240, while the sum is 61.

The square root of 3875988661 is about 62257.4385997368. The cubic root of 3875988661 is about 1570.8238959351.

The spelling of 3875988661 in words is "three billion, eight hundred seventy-five million, nine hundred eighty-eight thousand, six hundred sixty-one".