66287734479 has 8 divisors (see below), whose sum is σ = 98204051120. Its totient is φ = 44191822968.

The previous prime is 66287734439. The next prime is 66287734507. The reversal of 66287734479 is 97443778266.

It is a happy number.

66287734479 is a `hidden beast` number, since 6 + 6 + 287 + 7 + 344 + 7 + 9 = 666.

It is not a de Polignac number, because 66287734479 - 2⁷ = 66287734351 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66287734439) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1227550612 + ... + 1227550665.

It is an arithmetic number, because the mean of its divisors is an integer number (12275506390).

Almost surely, 2^66287734479 is an apocalyptic number.

66287734479 is a deficient number, since it is larger than the sum of its proper divisors (31916316641).

66287734479 is a wasteful number, since it uses less digits than its factorization.

66287734479 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2455101286 (or 2455101280 counting only the distinct ones).

The product of its digits is 85349376, while the sum is 63.

The spelling of 66287734479 in words is "sixty-six billion, two hundred eighty-seven million, seven hundred thirty-four thousand, four hundred seventy-nine".