166201688 has 8 divisors (see below), whose sum is σ = 311628180. Its totient is φ = 83100840.

The previous prime is 166201681. The next prime is 166201691. The reversal of 166201688 is 886102661.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166201681) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10387598 + ... + 10387613.

Almost surely, 2^166201688 is an apocalyptic number.

It is an amenable number.

166201688 is a deficient number, since it is larger than the sum of its proper divisors (145426492).

166201688 is a wasteful number, since it uses less digits than its factorization.

166201688 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20775217 (or 20775213 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 38.

The square root of 166201688 is about 12891.9233630983. The cubic root of 166201688 is about 549.8089562377.

The spelling of 166201688 in words is "one hundred sixty-six million, two hundred one thousand, six hundred eighty-eight".