66228501 has 8 divisors (see below), whose sum is σ = 88482240. Its totient is φ = 44063552.

The previous prime is 66228479. The next prime is 66228527. The reversal of 66228501 is 10582266.

66228501 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 66228501 - 2⁹ = 66227989 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66228541) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20436 + ... + 23453.

It is an arithmetic number, because the mean of its divisors is an integer number (11060280).

Almost surely, 2^66228501 is an apocalyptic number.

It is an amenable number.

66228501 is a deficient number, since it is larger than the sum of its proper divisors (22253739).

66228501 is a wasteful number, since it uses less digits than its factorization.

66228501 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44395.

The product of its (nonzero) digits is 5760, while the sum is 30.

The square root of 66228501 is about 8138.0895178168. The cubic root of 66228501 is about 404.5898423419.

The spelling of 66228501 in words is "sixty-six million, two hundred twenty-eight thousand, five hundred one".