66021227611 has 8 divisors (see below), whose sum is σ = 70753654944. Its totient is φ = 61443961920.

The previous prime is 66021227513. The next prime is 66021227677. The reversal of 66021227611 is 11672212066.

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 66021227611 - 2¹¹ = 66021225563 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66021227411) 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, 38789530 + ... + 38791231.

It is an arithmetic number, because the mean of its divisors is an integer number (8844206868).

Almost surely, 2^66021227611 is an apocalyptic number.

66021227611 is a deficient number, since it is larger than the sum of its proper divisors (4732427333).

66021227611 is a wasteful number, since it uses less digits than its factorization.

66021227611 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77580821.

The product of its (nonzero) digits is 12096, while the sum is 34.

Adding to 66021227611 its reverse (11672212066), we get a palindrome (77693439677).

The spelling of 66021227611 in words is "sixty-six billion, twenty-one million, two hundred twenty-seven thousand, six hundred eleven".