166666500650516 has 12 divisors (see below), whose sum is σ = 292448323530132. Its totient is φ = 83109836784768.

The previous prime is 166666500650509. The next prime is 166666500650519. The reversal of 166666500650516 is 615056005666661.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 77137927152400 + 89528573498116 = 8782820^2 + 9461954^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166666500650519) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 55853383445 + ... + 55853386428.

It is an arithmetic number, because the mean of its divisors is an integer number (24370693627511).

Almost surely, 2^{166666500650516} is an apocalyptic number.

It is an amenable number.

166666500650516 is a deficient number, since it is larger than the sum of its proper divisors (125781822879616).

166666500650516 is a wasteful number, since it uses less digits than its factorization.

166666500650516 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 111706770250 (or 111706770248 counting only the distinct ones).

The product of its (nonzero) digits is 34992000, while the sum is 59.

The spelling of 166666500650516 in words is "one hundred sixty-six trillion, six hundred sixty-six billion, five hundred million, six hundred fifty thousand, five hundred sixteen".