66558285567 has 12 divisors (see below), whose sum is σ = 96169672560. Its totient is φ = 44358378048.

The previous prime is 66558285517. The next prime is 66558285587. The reversal of 66558285567 is 76558285566.

66558285567 is a `hidden beast` number, since 6 + 6 + 5 + 58 + 28 + 556 + 7 = 666.

It is not a de Polignac number, because 66558285567 - 2¹⁶ = 66558220031 is a prime.

It is a super-2 number, since 2×66558285567² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66558285517) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1120467 + ... + 1178372.

It is an arithmetic number, because the mean of its divisors is an integer number (8014139380).

Almost surely, 2^66558285567 is an apocalyptic number.

66558285567 is a deficient number, since it is larger than the sum of its proper divisors (29611386993).

66558285567 is a wasteful number, since it uses less digits than its factorization.

66558285567 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2302062 (or 2302059 counting only the distinct ones).

The product of its digits is 120960000, while the sum is 63.

Subtracting 66558285567 from its reverse (76558285566), we obtain a palindrome (9999999999).

The spelling of 66558285567 in words is "sixty-six billion, five hundred fifty-eight million, two hundred eighty-five thousand, five hundred sixty-seven".