7121660180 has 48 divisors (see below), whose sum is σ = 15804089280. Its totient is φ = 2688196608.

The previous prime is 7121660171. The next prime is 7121660207. The reversal of 7121660180 is 810661217.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 61199 + ... + 134121.

It is an arithmetic number, because the mean of its divisors is an integer number (329251860).

Almost surely, 2^7121660180 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 7121660180, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (7902044640).

7121660180 is an abundant number, since it is smaller than the sum of its proper divisors (8682429100).

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

7121660180 is a wasteful number, since it uses less digits than its factorization.

7121660180 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 73208 (or 73206 counting only the distinct ones).

The product of its (nonzero) digits is 4032, while the sum is 32.

The square root of 7121660180 is about 84389.9293754889. The cubic root of 7121660180 is about 1923.9498566352.

The spelling of 7121660180 in words is "seven billion, one hundred twenty-one million, six hundred sixty thousand, one hundred eighty".