166655705 has 16 divisors (see below), whose sum is σ = 202535424. Its totient is φ = 131637120.

The previous prime is 166655701. The next prime is 166655729. The reversal of 166655705 is 507556661.

It is not a de Polignac number, because 166655705 - 2² = 166655701 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (166655701) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 152210 + ... + 153300.

It is an arithmetic number, because the mean of its divisors is an integer number (12658464).

Almost surely, 2^166655705 is an apocalyptic number.

It is an amenable number.

166655705 is a deficient number, since it is larger than the sum of its proper divisors (35879719).

166655705 is a wasteful number, since it uses less digits than its factorization.

166655705 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1456.

The product of its (nonzero) digits is 189000, while the sum is 41.

The square root of 166655705 is about 12909.5199368528. The cubic root of 166655705 is about 550.3091430093.

The spelling of 166655705 in words is "one hundred sixty-six million, six hundred fifty-five thousand, seven hundred five".