66200620 has 48 divisors (see below), whose sum is σ = 144930240. Its totient is φ = 25369344.

The previous prime is 66200599. The next prime is 66200621. The reversal of 66200620 is 2600266.

It is a junction number, because it is equal to n+sod(n) for n = 66200591 and 66200600.

It is not an unprimeable number, because it can be changed into a prime (66200621) 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, 90697 + ... + 91423.

It is an arithmetic number, because the mean of its divisors is an integer number (3019380).

Almost surely, 2^66200620 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 66200620, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (72465120).

66200620 is an abundant number, since it is smaller than the sum of its proper divisors (78729620).

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

66200620 is a wasteful number, since it uses less digits than its factorization.

66200620 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 922 (or 920 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 22.

The square root of 66200620 is about 8136.3763433116. The cubic root of 66200620 is about 404.5330593732.

Adding to 66200620 its reverse (2600266), we get a palindrome (68800886).

The spelling of 66200620 in words is "sixty-six million, two hundred thousand, six hundred twenty".