66322651 has 2 divisors, whose sum is σ = 66322652. Its totient is φ = 66322650.

The previous prime is 66322583. The next prime is 66322691. The reversal of 66322651 is 15622366.

66322651 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 66322651 - 2¹⁹ = 65798363 is a prime.

It is not a weakly prime, because it can be changed into another prime (66322691) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33161325 + 33161326.

It is an arithmetic number, because the mean of its divisors is an integer number (33161326).

Almost surely, 2^66322651 is an apocalyptic number.

66322651 is a deficient number, since it is larger than the sum of its proper divisors (1).

66322651 is an equidigital number, since it uses as much as digits as its factorization.

66322651 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 12960, while the sum is 31.

The square root of 66322651 is about 8143.8719906443. The cubic root of 66322651 is about 404.7814723140.

The spelling of 66322651 in words is "sixty-six million, three hundred twenty-two thousand, six hundred fifty-one".