166520066 has 48 divisors (see below), whose sum is σ = 285141600. Its totient is φ = 72695808.

The previous prime is 166520051. The next prime is 166520087. The reversal of 166520066 is 660025661.

166520066 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 647810 + ... + 648066.

It is an arithmetic number, because the mean of its divisors is an integer number (5940450).

Almost surely, 2^166520066 is an apocalyptic number.

166520066 is a deficient number, since it is larger than the sum of its proper divisors (118621534).

166520066 is a wasteful number, since it uses less digits than its factorization.

166520066 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 371 (or 354 counting only the distinct ones).

The product of its (nonzero) digits is 12960, while the sum is 32.

The square root of 166520066 is about 12904.2654188450. The cubic root of 166520066 is about 550.1598059045.

The spelling of 166520066 in words is "one hundred sixty-six million, five hundred twenty thousand, sixty-six".