7872252660 has 36 divisors (see below), whose sum is σ = 23879166948. Its totient is φ = 2099267328.

The previous prime is 7872252637. The next prime is 7872252667. The reversal of 7872252660 is 662522787.

It can be written as a sum of positive squares in 2 ways, for example, as 4278729744 + 3593522916 = 65412^2 + 59946^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7872252667) 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 11 ways as a sum of consecutive naturals, for example, 21867189 + ... + 21867548.

It is an arithmetic number, because the mean of its divisors is an integer number (663310193).

Almost surely, 2^7872252660 is an apocalyptic number.

It is an amenable number.

7872252660 is an abundant number, since it is smaller than the sum of its proper divisors (16006914288).

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

7872252660 is a wasteful number, since it uses less digits than its factorization.

7872252660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43734752 (or 43734747 counting only the distinct ones).

The product of its (nonzero) digits is 564480, while the sum is 45.

The square root of 7872252660 is about 88725.7158889124. The cubic root of 7872252660 is about 1989.2972157041.

The spelling of 7872252660 in words is "seven billion, eight hundred seventy-two million, two hundred fifty-two thousand, six hundred sixty".