66021229 has 8 divisors (see below), whose sum is σ = 67541760. Its totient is φ = 64505616.

The previous prime is 66021187. The next prime is 66021239. The reversal of 66021229 is 92212066.

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 66021229 - 2¹⁹ = 65496941 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 66021197 and 66021206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66021239) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 45487 + ... + 46915.

It is an arithmetic number, because the mean of its divisors is an integer number (8442720).

Almost surely, 2^66021229 is an apocalyptic number.

It is an amenable number.

66021229 is a deficient number, since it is larger than the sum of its proper divisors (1520531).

66021229 is a wasteful number, since it uses less digits than its factorization.

66021229 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2459.

The product of its (nonzero) digits is 2592, while the sum is 28.

The square root of 66021229 is about 8125.3448542200. The cubic root of 66021229 is about 404.1673264500.

The spelling of 66021229 in words is "sixty-six million, twenty-one thousand, two hundred twenty-nine".