66226671555 has 32 divisors (see below), whose sum is σ = 115613671680. Its totient is φ = 32104894080.

The previous prime is 66226671509. The next prime is 66226671559. The reversal of 66226671555 is 55517662266.

It is not a de Polignac number, because 66226671555 - 2¹¹ = 66226669507 is a prime.

It is a super-2 number, since 2×66226671555² (a number of 22 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 66226671498 and 66226671507.

It is not an unprimeable number, because it can be changed into a prime (66226671559) 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 31 ways as a sum of consecutive naturals, for example, 1169076 + ... + 1224414.

It is an arithmetic number, because the mean of its divisors is an integer number (3612927240).

Almost surely, 2^66226671555 is an apocalyptic number.

66226671555 is a deficient number, since it is larger than the sum of its proper divisors (49387000125).

66226671555 is a wasteful number, since it uses less digits than its factorization.

66226671555 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 62611.

The product of its digits is 4536000, while the sum is 51.

The spelling of 66226671555 in words is "sixty-six billion, two hundred twenty-six million, six hundred seventy-one thousand, five hundred fifty-five".