166147206128 has 40 divisors (see below), whose sum is σ = 323448964608. Its totient is φ = 82676728512.

The previous prime is 166147206109. The next prime is 166147206157. The reversal of 166147206128 is 821602741661.

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, 22128551 + ... + 22136057.

Almost surely, 2^166147206128 is an apocalyptic number.

It is an amenable number.

166147206128 is a deficient number, since it is larger than the sum of its proper divisors (157301758480).

166147206128 is a wasteful number, since it uses less digits than its factorization.

166147206128 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13941 (or 13935 counting only the distinct ones).

The product of its (nonzero) digits is 193536, while the sum is 44.

Adding to 166147206128 its reverse (821602741661), we get a palindrome (987749947789).

The spelling of 166147206128 in words is "one hundred sixty-six billion, one hundred forty-seven million, two hundred six thousand, one hundred twenty-eight".