66021227601 has 8 divisors (see below), whose sum is σ = 100603775424. Its totient is φ = 37726415760.

The previous prime is 66021227513. The next prime is 66021227677. The reversal of 66021227601 is 10672212066.

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

It is not a de Polignac number, because 66021227601 - 2¹⁹ = 66020703313 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (66021227801) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1571933970 + ... + 1571934011.

It is an arithmetic number, because the mean of its divisors is an integer number (12575471928).

Almost surely, 2^66021227601 is an apocalyptic number.

It is an amenable number.

66021227601 is a deficient number, since it is larger than the sum of its proper divisors (34582547823).

66021227601 is a wasteful number, since it uses less digits than its factorization.

66021227601 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3143867991.

The product of its (nonzero) digits is 12096, while the sum is 33.

Adding to 66021227601 its reverse (10672212066), we get a palindrome (76693439667).

The spelling of 66021227601 in words is "sixty-six billion, twenty-one million, two hundred twenty-seven thousand, six hundred one".