66300520 has 128 divisors (see below), whose sum is σ = 178899840. Its totient is φ = 21795840.

The previous prime is 66300511. The next prime is 66300529. The reversal of 66300520 is 2500366.

It is an interprime number because it is at equal distance from previous prime (66300511) and next prime (66300529).

It is a Harshad number since it is a multiple of its sum of digits (22).

It is a junction number, because it is equal to n+sod(n) for n = 66300491 and 66300500.

It is not an unprimeable number, because it can be changed into a prime (66300529) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 383154 + ... + 383326.

It is an arithmetic number, because the mean of its divisors is an integer number (1397655).

Almost surely, 2^66300520 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 66300520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (89449920).

66300520 is an abundant number, since it is smaller than the sum of its proper divisors (112599320).

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

66300520 is a wasteful number, since it uses less digits than its factorization.

66300520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 275 (or 271 counting only the distinct ones).

The product of its (nonzero) digits is 1080, while the sum is 22.

The square root of 66300520 is about 8142.5131255651. The cubic root of 66300520 is about 404.7364438799.

Adding to 66300520 its reverse (2500366), we get a palindrome (68800886).

The spelling of 66300520 in words is "sixty-six million, three hundred thousand, five hundred twenty".