66051659 has 2 divisors, whose sum is σ = 66051660. Its totient is φ = 66051658.

The previous prime is 66051637. The next prime is 66051679. The reversal of 66051659 is 95615066.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 66051659 - 2²⁴ = 49274443 is a prime.

It is not a weakly prime, because it can be changed into another prime (66051679) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33025829 + 33025830.

It is an arithmetic number, because the mean of its divisors is an integer number (33025830).

Almost surely, 2^66051659 is an apocalyptic number.

66051659 is a deficient number, since it is larger than the sum of its proper divisors (1).

66051659 is an equidigital number, since it uses as much as digits as its factorization.

66051659 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 48600, while the sum is 38.

The square root of 66051659 is about 8127.2171744085. The cubic root of 66051659 is about 404.2294121500.

The spelling of 66051659 in words is "sixty-six million, fifty-one thousand, six hundred fifty-nine".