66112639 has 2 divisors, whose sum is σ = 66112640. Its totient is φ = 66112638.

The previous prime is 66112633. The next prime is 66112661. The reversal of 66112639 is 93621166.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 66112639 - 2¹³ = 66104447 is a prime.

It is a zygodrome in base 2.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (66112633) 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, 33056319 + 33056320.

It is an arithmetic number, because the mean of its divisors is an integer number (33056320).

Almost surely, 2^66112639 is an apocalyptic number.

66112639 is a deficient number, since it is larger than the sum of its proper divisors (1).

66112639 is an equidigital number, since it uses as much as digits as its factorization.

66112639 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 11664, while the sum is 34.

The square root of 66112639 is about 8130.9679005639. The cubic root of 66112639 is about 404.3537710134.

The spelling of 66112639 in words is "sixty-six million, one hundred twelve thousand, six hundred thirty-nine".