66663016 has 64 divisors (see below), whose sum is σ = 151315200. Its totient is φ = 26915328.

The previous prime is 66663013. The next prime is 66663017. The reversal of 66663016 is 61036666.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (66663013) 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, 93670 + ... + 94378.

It is an arithmetic number, because the mean of its divisors is an integer number (2364300).

Almost surely, 2^66663016 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 66663016, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (75657600).

66663016 is an abundant number, since it is smaller than the sum of its proper divisors (84652184).

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

66663016 is a wasteful number, since it uses less digits than its factorization.

66663016 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 818 (or 814 counting only the distinct ones).

The product of its (nonzero) digits is 23328, while the sum is 34.

The square root of 66663016 is about 8164.7422494528. The cubic root of 66663016 is about 405.4727315391.

The spelling of 66663016 in words is "sixty-six million, six hundred sixty-three thousand, sixteen".