66290223 has 8 divisors (see below), whose sum is σ = 88638768. Its totient is φ = 44067584.

The previous prime is 66290197. The next prime is 66290281. The reversal of 66290223 is 32209266.

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 66290223 - 2¹² = 66286127 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66290423) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 30240 + ... + 32357.

It is an arithmetic number, because the mean of its divisors is an integer number (11079846).

Almost surely, 2^66290223 is an apocalyptic number.

66290223 is a deficient number, since it is larger than the sum of its proper divisors (22348545).

66290223 is a wasteful number, since it uses less digits than its factorization.

66290223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 62953.

The product of its (nonzero) digits is 7776, while the sum is 30.

The square root of 66290223 is about 8141.8808023699. The cubic root of 66290223 is about 404.7154898615.

Adding to 66290223 its reverse (32209266), we get a palindrome (98499489).

The spelling of 66290223 in words is "sixty-six million, two hundred ninety thousand, two hundred twenty-three".