166980154 has 24 divisors (see below), whose sum is σ = 290269728. Its totient is φ = 71432640.

The previous prime is 166980139. The next prime is 166980251. The reversal of 166980154 is 451089661.

It is an unprimeable number.

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 11 ways as a sum of consecutive naturals, for example, 6774 + ... + 19489.

It is an arithmetic number, because the mean of its divisors is an integer number (12094572).

Almost surely, 2^166980154 is an apocalyptic number.

166980154 is a deficient number, since it is larger than the sum of its proper divisors (123289574).

166980154 is a wasteful number, since it uses less digits than its factorization.

166980154 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26310 (or 26293 counting only the distinct ones).

The product of its (nonzero) digits is 51840, while the sum is 40.

The square root of 166980154 is about 12922.0800957121. The cubic root of 166980154 is about 550.6660295012. Note that the first 3 decimals are identical.

The spelling of 166980154 in words is "one hundred sixty-six million, nine hundred eighty thousand, one hundred fifty-four".