64662013320 has 128 divisors (see below), whose sum is σ = 196229088000. Its totient is φ = 17044577280.

The previous prime is 64662013319. The next prime is 64662013349. The reversal of 64662013320 is 2331026646.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 5736490 + ... + 5747750.

It is an arithmetic number, because the mean of its divisors is an integer number (1533039750).

Almost surely, 2^64662013320 is an apocalyptic number.

64662013320 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 64662013320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (98114544000).

64662013320 is an abundant number, since it is smaller than the sum of its proper divisors (131567074680).

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

64662013320 is a wasteful number, since it uses less digits than its factorization.

64662013320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11823 (or 11819 counting only the distinct ones).

The product of its (nonzero) digits is 31104, while the sum is 33.

Adding to 64662013320 its reverse (2331026646), we get a palindrome (66993039966).

The spelling of 64662013320 in words is "sixty-four billion, six hundred sixty-two million, thirteen thousand, three hundred twenty".