66254577372849 has 16 divisors (see below), whose sum is σ = 90886126467392. Its totient is φ = 42914434894848.

The previous prime is 66254577372847. The next prime is 66254577372871. The reversal of 66254577372849 is 94827377545266.

It is not a de Polignac number, because 66254577372849 - 2¹ = 66254577372847 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (66254577372847) 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 in 15 ways as a sum of consecutive naturals, for example, 2257689184 + ... + 2257718529.

It is an arithmetic number, because the mean of its divisors is an integer number (5680382904212).

Almost surely, 2^{66254577372849} is an apocalyptic number.

It is an amenable number.

66254577372849 is a deficient number, since it is larger than the sum of its proper divisors (24631549094543).

66254577372849 is a wasteful number, since it uses less digits than its factorization.

66254577372849 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4515407856.

The product of its digits is 4267468800, while the sum is 75.

The spelling of 66254577372849 in words is "sixty-six trillion, two hundred fifty-four billion, five hundred seventy-seven million, three hundred seventy-two thousand, eight hundred forty-nine".