66166611666166 has 16 divisors (see below), whose sum is σ = 108293543547840. Its totient is φ = 30069925276680.

The previous prime is 66166611666151. The next prime is 66166611666187.

66166611666166 is nontrivially palindromic in base 10.

It is a super-2 number, since 2×66166611666166² (a number of 28 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 66166611666098 and 66166611666107.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 290248416 + ... + 290476291.

It is an arithmetic number, because the mean of its divisors is an integer number (6768346471740).

Almost surely, 2^{66166611666166} is an apocalyptic number.

66166611666166 is a deficient number, since it is larger than the sum of its proper divisors (42126931881674).

66166611666166 is a wasteful number, since it uses less digits than its factorization.

66166611666166 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 580729899.

The product of its digits is 60466176, while the sum is 64.

The spelling of 66166611666166 in words is "sixty-six trillion, one hundred sixty-six billion, six hundred eleven million, six hundred sixty-six thousand, one hundred sixty-six".