66063984 has 80 divisors (see below), whose sum is σ = 197154048. Its totient is φ = 18671616.

The previous prime is 66063983. The next prime is 66064043. The reversal of 66063984 is 48936066.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a zygodrome in base 2.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66063983) 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, 31579 + ... + 33605.

Almost surely, 2^66063984 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 66063984, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (98577024).

66063984 is an abundant number, since it is smaller than the sum of its proper divisors (131090064).

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

66063984 is a wasteful number, since it uses less digits than its factorization.

66063984 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2142 (or 2136 counting only the distinct ones).

The product of its (nonzero) digits is 186624, while the sum is 42.

The square root of 66063984 is about 8127.9753936635. The cubic root of 66063984 is about 404.2545531671.

The spelling of 66063984 in words is "sixty-six million, sixty-three thousand, nine hundred eighty-four".