166666666756 has 12 divisors (see below), whose sum is σ = 291694285260. Its totient is φ = 83325442400.

The previous prime is 166666666729. The next prime is 166666666783. The reversal of 166666666756 is 657666666661.

It is an interprime number because it is at equal distance from previous prime (166666666729) and next prime (166666666783).

It can be written as a sum of positive squares in 2 ways, for example, as 48629070400 + 118037596356 = 220520^2 + 343566^2 .

It is a junction number, because it is equal to n+sod(n) for n = 166666666691 and 166666666700.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1925095 + ... + 2009806.

It is an arithmetic number, because the mean of its divisors is an integer number (24307857105).

Almost surely, 2^166666666756 is an apocalyptic number.

It is an amenable number.

166666666756 is a deficient number, since it is larger than the sum of its proper divisors (125027618504).

166666666756 is a wasteful number, since it uses less digits than its factorization.

166666666756 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3945494 (or 3945492 counting only the distinct ones).

The product of its digits is 352719360, while the sum is 67.

The spelling of 166666666756 in words is "one hundred sixty-six billion, six hundred sixty-six million, six hundred sixty-six thousand, seven hundred fifty-six".