7520666380 has 48 divisors (see below), whose sum is σ = 16819215840. Its totient is φ = 2814921728.

The previous prime is 7520666359. The next prime is 7520666389. The reversal of 7520666380 is 836660257.

It is not an unprimeable number, because it can be changed into a prime (7520666389) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5110 + ... + 122749.

It is an arithmetic number, because the mean of its divisors is an integer number (350400330).

Almost surely, 2^7520666380 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 7520666380, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (8409607920).

7520666380 is an abundant number, since it is smaller than the sum of its proper divisors (9298549460).

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

7520666380 is a wasteful number, since it uses less digits than its factorization.

7520666380 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 128058 (or 128056 counting only the distinct ones).

The product of its (nonzero) digits is 362880, while the sum is 43.

The square root of 7520666380 is about 86721.7756967649. The cubic root of 7520666380 is about 1959.2300859870.

The spelling of 7520666380 in words is "seven billion, five hundred twenty million, six hundred sixty-six thousand, three hundred eighty".