66322464 has 96 divisors (see below), whose sum is σ = 197426880. Its totient is φ = 19325952.

The previous prime is 66322453. The next prime is 66322481. The reversal of 66322464 is 46422366.

It is a tau number, because it is divible by the number of its divisors (96).

It is a nude number because it is divisible by every one of its digits.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 22314 + ... + 25110.

It is an arithmetic number, because the mean of its divisors is an integer number (2056530).

Almost surely, 2^66322464 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 66322464, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (98713440).

66322464 is an abundant number, since it is smaller than the sum of its proper divisors (131104416).

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

66322464 is a wasteful number, since it uses less digits than its factorization.

66322464 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2842 (or 2834 counting only the distinct ones).

The product of its digits is 41472, while the sum is 33.

The square root of 66322464 is about 8143.8605096109. The cubic root of 66322464 is about 404.7810918798.

The spelling of 66322464 in words is "sixty-six million, three hundred twenty-two thousand, four hundred sixty-four".