166666606665546 has 64 divisors (see below), whose sum is σ = 365063722208640. Its totient is φ = 50412130010880.

The previous prime is 166666606665523. The next prime is 166666606665553. The reversal of 166666606665546 is 645566606666661.

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, 387370036 + ... + 387800048.

It is an arithmetic number, because the mean of its divisors is an integer number (5704120659510).

Almost surely, 2^{166666606665546} is an apocalyptic number.

166666606665546 is an abundant number, since it is smaller than the sum of its proper divisors (198397115543094).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

166666606665546 is a wasteful number, since it uses less digits than its factorization.

166666606665546 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 514311.

The product of its (nonzero) digits is 6046617600, while the sum is 75.

The spelling of 166666606665546 in words is "one hundred sixty-six trillion, six hundred sixty-six billion, six hundred six million, six hundred sixty-five thousand, five hundred forty-six".