66056101211321 has 24 divisors (see below), whose sum is σ = 76894822235520. Its totient is φ = 56536602647616.

The previous prime is 66056101211291. The next prime is 66056101211381. The reversal of 66056101211321 is 12311210165066.

It is not a de Polignac number, because 66056101211321 - 2⁴² = 61658054700217 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66056101211381) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 218698190 + ... + 219000023.

It is an arithmetic number, because the mean of its divisors is an integer number (3203950926480).

Almost surely, 2^{66056101211321} is an apocalyptic number.

It is an amenable number.

66056101211321 is a deficient number, since it is larger than the sum of its proper divisors (10838721024199).

66056101211321 is a wasteful number, since it uses less digits than its factorization.

66056101211321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 437698305 (or 437698292 counting only the distinct ones).

The product of its (nonzero) digits is 12960, while the sum is 35.

Adding to 66056101211321 its reverse (12311210165066), we get a palindrome (78367311376387).

The spelling of 66056101211321 in words is "sixty-six trillion, fifty-six billion, one hundred one million, two hundred eleven thousand, three hundred twenty-one".