166960121986 has 16 divisors (see below), whose sum is σ = 286222801536. Its totient is φ = 71552975616.

The previous prime is 166960121983. The next prime is 166960122011. The reversal of 166960121986 is 689121069661.

It is not an unprimeable number, because it can be changed into a prime (166960121983) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1082530 + ... + 1227106.

It is an arithmetic number, because the mean of its divisors is an integer number (17888925096).

Almost surely, 2^166960121986 is an apocalyptic number.

166960121986 is a deficient number, since it is larger than the sum of its proper divisors (119262679550).

166960121986 is a wasteful number, since it uses less digits than its factorization.

166960121986 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 227073.

The product of its (nonzero) digits is 1679616, while the sum is 55.

The spelling of 166960121986 in words is "one hundred sixty-six billion, nine hundred sixty million, one hundred twenty-one thousand, nine hundred eighty-six".