66498480 has 120 divisors (see below), whose sum is σ = 235126320. Its totient is φ = 16796160.

The previous prime is 66498413. The next prime is 66498533. The reversal of 66498480 is 8489466.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (120).

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 11250 + ... + 16110.

It is an arithmetic number, because the mean of its divisors is an integer number (1959386).

Almost surely, 2^66498480 is an apocalyptic number.

66498480 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 66498480, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (117563160).

66498480 is an abundant number, since it is smaller than the sum of its proper divisors (168627840).

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

66498480 is a wasteful number, since it uses less digits than its factorization.

66498480 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4899 (or 4890 counting only the distinct ones).

The product of its (nonzero) digits is 331776, while the sum is 45.

The square root of 66498480 is about 8154.6600174379. The cubic root of 66498480 is about 405.1388641329.

It can be divided in two parts, 6649 and 8480, that added together give a square (15129 = 123²).

The spelling of 66498480 in words is "sixty-six million, four hundred ninety-eight thousand, four hundred eighty".