166666116615145 has 32 divisors (see below), whose sum is σ = 234841091385600. Its totient is φ = 111190067490816.

The previous prime is 166666116615133. The next prime is 166666116615241. The reversal of 166666116615145 is 541516611666661.

It is a cyclic number.

It is not a de Polignac number, because 166666116615145 - 2²³ = 166666108226537 is a prime.

It is a super-2 number, since 2×166666116615145² (a number of 29 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 415830540 + ... + 416231149.

It is an arithmetic number, because the mean of its divisors is an integer number (7338784105800).

Almost surely, 2^{166666116615145} is an apocalyptic number.

It is an amenable number.

166666116615145 is a deficient number, since it is larger than the sum of its proper divisors (68174974770455).

166666116615145 is an equidigital number, since it uses as much as digits as its factorization.

166666116615145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 832061857.

The product of its digits is 27993600, while the sum is 61.

The spelling of 166666116615145 in words is "one hundred sixty-six trillion, six hundred sixty-six billion, one hundred sixteen million, six hundred fifteen thousand, one hundred forty-five".