166199601 has 16 divisors (see below), whose sum is σ = 227215296. Its totient is φ = 108002496.

The previous prime is 166199591. The next prime is 166199617. The reversal of 166199601 is 106991661.

It is not a de Polignac number, because 166199601 - 2²² = 162005297 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 166199601.

It is not an unprimeable number, because it can be changed into a prime (166199681) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 83251 + ... + 85223.

It is an arithmetic number, because the mean of its divisors is an integer number (14200956).

Almost surely, 2^166199601 is an apocalyptic number.

It is an amenable number.

166199601 is a deficient number, since it is larger than the sum of its proper divisors (61015695).

166199601 is a wasteful number, since it uses less digits than its factorization.

166199601 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2672.

The product of its (nonzero) digits is 17496, while the sum is 39.

The square root of 166199601 is about 12891.8424206938. The cubic root of 166199601 is about 549.8066549051.

The spelling of 166199601 in words is "one hundred sixty-six million, one hundred ninety-nine thousand, six hundred one".