66422887 has 2 divisors, whose sum is σ = 66422888. Its totient is φ = 66422886.

The previous prime is 66422861. The next prime is 66422897. The reversal of 66422887 is 78822466.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-66422887 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (66422897) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33211443 + 33211444.

It is an arithmetic number, because the mean of its divisors is an integer number (33211444).

Almost surely, 2^66422887 is an apocalyptic number.

66422887 is a deficient number, since it is larger than the sum of its proper divisors (1).

66422887 is an equidigital number, since it uses as much as digits as its factorization.

66422887 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 258048, while the sum is 43.

The square root of 66422887 is about 8150.0237422967. The cubic root of 66422887 is about 404.9852903259.

The spelling of 66422887 in words is "sixty-six million, four hundred twenty-two thousand, eight hundred eighty-seven".