166666540057 has 8 divisors (see below), whose sum is σ = 176931219456. Its totient is φ = 156453056832.

The previous prime is 166666540043. The next prime is 166666540099. The reversal of 166666540057 is 750045666661.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 166666540057 - 2⁷ = 166666539929 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 166666539986 and 166666540013.

It is not an unprimeable number, because it can be changed into a prime (166666540457) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12792333 + ... + 12805354.

It is an arithmetic number, because the mean of its divisors is an integer number (22116402432).

Almost surely, 2^166666540057 is an apocalyptic number.

166666540057 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

It is an amenable number.

166666540057 is a deficient number, since it is larger than the sum of its proper divisors (10264679399).

166666540057 is a wasteful number, since it uses less digits than its factorization.

166666540057 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25598087.

The product of its (nonzero) digits is 5443200, while the sum is 52.

The spelling of 166666540057 in words is "one hundred sixty-six billion, six hundred sixty-six million, five hundred forty thousand, fifty-seven".