6651354350401 has 2 divisors, whose sum is σ = 6651354350402. Its totient is φ = 6651354350400.

The previous prime is 6651354350371. The next prime is 6651354350413. The reversal of 6651354350401 is 1040534531566.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3676422760000 + 2974931590401 = 1917400^2 + 1724799^2 .

It is a cyclic number.

It is not a de Polignac number, because 6651354350401 - 2²⁷ = 6651220132673 is a prime.

It is not a weakly prime, because it can be changed into another prime (6651354350491) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3325677175200 + 3325677175201.

It is an arithmetic number, because the mean of its divisors is an integer number (3325677175201).

Almost surely, 2^{6651354350401} is an apocalyptic number.

It is an amenable number.

6651354350401 is a deficient number, since it is larger than the sum of its proper divisors (1).

6651354350401 is an equidigital number, since it uses as much as digits as its factorization.

6651354350401 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 648000, while the sum is 43.

Adding to 6651354350401 its reverse (1040534531566), we get a palindrome (7691888881967).

The spelling of 6651354350401 in words is "six trillion, six hundred fifty-one billion, three hundred fifty-four million, three hundred fifty thousand, four hundred one".