66488016 has 80 divisors (see below), whose sum is σ = 197181824. Its totient is φ = 18911232.

The previous prime is 66487991. The next prime is 66488027. The reversal of 66488016 is 61088466.

It is a congruent number.

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, 145260 + ... + 145716.

Almost surely, 2^66488016 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 66488016, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (98590912).

66488016 is an abundant number, since it is smaller than the sum of its proper divisors (130693808).

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

66488016 is a wasteful number, since it uses less digits than its factorization.

66488016 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 908 (or 902 counting only the distinct ones).

The product of its (nonzero) digits is 55296, while the sum is 39.

The square root of 66488016 is about 8154.0183958586. The cubic root of 66488016 is about 405.1176125421.

The spelling of 66488016 in words is "sixty-six million, four hundred eighty-eight thousand, sixteen".