66151663 has 2 divisors, whose sum is σ = 66151664. Its totient is φ = 66151662.

The previous prime is 66151661. The next prime is 66151681. The reversal of 66151663 is 36615166.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 66151663 - 2¹ = 66151661 is a prime.

Together with 66151661, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (66151661) 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, 33075831 + 33075832.

It is an arithmetic number, because the mean of its divisors is an integer number (33075832).

Almost surely, 2^66151663 is an apocalyptic number.

66151663 is a deficient number, since it is larger than the sum of its proper divisors (1).

66151663 is an equidigital number, since it uses as much as digits as its factorization.

66151663 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 19440, while the sum is 34.

The square root of 66151663 is about 8133.3672608582. The cubic root of 66151663 is about 404.4333140383.

The spelling of 66151663 in words is "sixty-six million, one hundred fifty-one thousand, six hundred sixty-three".