166687676872546 has 16 divisors (see below), whose sum is σ = 250266842916984. Its totient is φ = 83265410277504.

The previous prime is 166687676872529. The next prime is 166687676872553. The reversal of 166687676872546 is 645278676786661.

It can be written as a sum of positive squares in 4 ways, for example, as 159691519621921 + 6996157250625 = 12636911^2 + 2645025^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19634080 + ... + 26811796.

Almost surely, 2^{166687676872546} is an apocalyptic number.

166687676872546 is a deficient number, since it is larger than the sum of its proper divisors (83579166044438).

166687676872546 is a wasteful number, since it uses less digits than its factorization.

166687676872546 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7188645.

The product of its digits is 40967700480, while the sum is 85.

The spelling of 166687676872546 in words is "one hundred sixty-six trillion, six hundred eighty-seven billion, six hundred seventy-six million, eight hundred seventy-two thousand, five hundred forty-six".