66226480 has 80 divisors (see below), whose sum is σ = 160802208. Its totient is φ = 25344000.

The previous prime is 66226471. The next prime is 66226483. The reversal of 66226480 is 8462266.

It is a tau number, because it is divible by the number of its divisors (80).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66226483) 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, 199915 + ... + 200245.

Almost surely, 2^66226480 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 66226480, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (80401104).

66226480 is an abundant number, since it is smaller than the sum of its proper divisors (94575728).

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

66226480 is a wasteful number, since it uses less digits than its factorization.

66226480 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 446 (or 440 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 34.

The square root of 66226480 is about 8137.9653476775. The cubic root of 66226480 is about 404.5857268711.

The spelling of 66226480 in words is "sixty-six million, two hundred twenty-six thousand, four hundred eighty".