66201330 has 64 divisors (see below), whose sum is σ = 172166400. Its totient is φ = 16194816.

The previous prime is 66201313. The next prime is 66201361. The reversal of 66201330 is 3310266.

It is a junction number, because it is equal to n+sod(n) for n = 66201297 and 66201306.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 77184 + ... + 78036.

It is an arithmetic number, because the mean of its divisors is an integer number (2690100).

Almost surely, 2^66201330 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 66201330, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (86083200).

66201330 is an abundant number, since it is smaller than the sum of its proper divisors (105965070).

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

66201330 is a wasteful number, since it uses less digits than its factorization.

66201330 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1075.

The product of its (nonzero) digits is 648, while the sum is 21.

The square root of 66201330 is about 8136.4199744114. The cubic root of 66201330 is about 404.5345055703.

Adding to 66201330 its reverse (3310266), we get a palindrome (69511596).

The spelling of 66201330 in words is "sixty-six million, two hundred one thousand, three hundred thirty".