66428611 has 2 divisors, whose sum is σ = 66428612. Its totient is φ = 66428610.

The previous prime is 66428543. The next prime is 66428627. The reversal of 66428611 is 11682466.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-66428611 is a prime.

It is not a weakly prime, because it can be changed into another prime (66428711) 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, 33214305 + 33214306.

It is an arithmetic number, because the mean of its divisors is an integer number (33214306).

Almost surely, 2^66428611 is an apocalyptic number.

66428611 is a deficient number, since it is larger than the sum of its proper divisors (1).

66428611 is an equidigital number, since it uses as much as digits as its factorization.

66428611 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 13824, while the sum is 34.

The square root of 66428611 is about 8150.3748993528. The cubic root of 66428611 is about 404.9969232099.

The spelling of 66428611 in words is "sixty-six million, four hundred twenty-eight thousand, six hundred eleven".