66123255232166 has 16 divisors (see below), whose sum is σ = 108202957220160. Its totient is φ = 30055673205480.

The previous prime is 66123255232129. The next prime is 66123255232297.

It is a happy number.

66123255232166 is nontrivially palindromic in base 10.

It is a super-2 number, since 2×66123255232166² (a number of 28 digits) contains 22 as substring.

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, 15668576 + ... + 19435811.

It is an arithmetic number, because the mean of its divisors is an integer number (6762684826260).

Almost surely, 2^{66123255232166} is an apocalyptic number.

66123255232166 is a deficient number, since it is larger than the sum of its proper divisors (42079701987994).

66123255232166 is a wasteful number, since it uses less digits than its factorization.

66123255232166 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35190019.

The product of its digits is 4665600, while the sum is 50.

The spelling of 66123255232166 in words is "sixty-six trillion, one hundred twenty-three billion, two hundred fifty-five million, two hundred thirty-two thousand, one hundred sixty-six".