66602831021201 has 2 divisors, whose sum is σ = 66602831021202. Its totient is φ = 66602831021200.

The previous prime is 66602831021191. The next prime is 66602831021227. The reversal of 66602831021201 is 10212013820666.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 53396984040976 + 13205846980225 = 7307324^2 + 3633985^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-66602831021201 is a prime.

It is a super-2 number, since 2×66602831021201² (a number of 28 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (66602831021231) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33301415510600 + 33301415510601.

It is an arithmetic number, because the mean of its divisors is an integer number (33301415510601).

Almost surely, 2^{66602831021201} is an apocalyptic number.

It is an amenable number.

66602831021201 is a deficient number, since it is larger than the sum of its proper divisors (1).

66602831021201 is an equidigital number, since it uses as much as digits as its factorization.

66602831021201 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 41472, while the sum is 38.

Adding to 66602831021201 its reverse (10212013820666), we get a palindrome (76814844841867).

The spelling of 66602831021201 in words is "sixty-six trillion, six hundred two billion, eight hundred thirty-one million, twenty-one thousand, two hundred one".