66303288 has 48 divisors (see below), whose sum is σ = 180643320. Its totient is φ = 21969216.

The previous prime is 66303277. The next prime is 66303311. The reversal of 66303288 is 88230366.

It is a super-2 number, since 2×66303288² = 8792251999221888, which contains 22 as substring.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (36).

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, 9795 + ... + 15117.

Almost surely, 2^66303288 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 66303288, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (90321660).

66303288 is an abundant number, since it is smaller than the sum of its proper divisors (114340032).

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

66303288 is a wasteful number, since it uses less digits than its factorization.

66303288 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5508 (or 5501 counting only the distinct ones).

The product of its (nonzero) digits is 41472, while the sum is 36.

The square root of 66303288 is about 8142.6830958843. The cubic root of 66303288 is about 404.7420762886.

The spelling of 66303288 in words is "sixty-six million, three hundred three thousand, two hundred eighty-eight".