166919601 has 8 divisors (see below), whose sum is σ = 222735744. Its totient is φ = 111191600.

The previous prime is 166919587. The next prime is 166919603. The reversal of 166919601 is 106919661.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 166919601 - 2²⁷ = 32701873 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 166919601.

It is not an unprimeable number, because it can be changed into a prime (166919603) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17481 + ... + 25286.

It is an arithmetic number, because the mean of its divisors is an integer number (27841968).

Almost surely, 2^166919601 is an apocalyptic number.

It is an amenable number.

166919601 is a deficient number, since it is larger than the sum of its proper divisors (55816143).

166919601 is a wasteful number, since it uses less digits than its factorization.

166919601 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44071.

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

The square root of 166919601 is about 12919.7368781257. The cubic root of 166919601 is about 550.5994576946.

The spelling of 166919601 in words is "one hundred sixty-six million, nine hundred nineteen thousand, six hundred one".