166661310414238 has 16 divisors (see below), whose sum is σ = 258639777360000. Its totient is φ = 80448660163872.

The previous prime is 166661310414227. The next prime is 166661310414239. The reversal of 166661310414238 is 832414013166661.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166661310414239) 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, 151665213 + ... + 152760136.

It is an arithmetic number, because the mean of its divisors is an integer number (16164986085000).

Almost surely, 2^{166661310414238} is an apocalyptic number.

166661310414238 is a deficient number, since it is larger than the sum of its proper divisors (91978466945762).

166661310414238 is a wasteful number, since it uses less digits than its factorization.

166661310414238 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 304434819.

The product of its (nonzero) digits is 2985984, while the sum is 52.

The spelling of 166661310414238 in words is "one hundred sixty-six trillion, six hundred sixty-one billion, three hundred ten million, four hundred fourteen thousand, two hundred thirty-eight".