66498912 has 72 divisors (see below), whose sum is σ = 191757384. Its totient is φ = 21855744.

The previous prime is 66498869. The next prime is 66498923. The reversal of 66498912 is 21989466.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (72).

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 19443 + ... + 22605.

It is an arithmetic number, because the mean of its divisors is an integer number (2663297).

Almost surely, 2^66498912 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 66498912, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (95878692).

66498912 is an abundant number, since it is smaller than the sum of its proper divisors (125258472).

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

66498912 is a wasteful number, since it uses less digits than its factorization.

66498912 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3252 (or 3241 counting only the distinct ones).

The product of its digits is 186624, while the sum is 45.

The square root of 66498912 is about 8154.6865053170. The cubic root of 66498912 is about 405.1397414442.

The spelling of 66498912 in words is "sixty-six million, four hundred ninety-eight thousand, nine hundred twelve".