199662071 has 8 divisors (see below), whose sum is σ = 236053920. Its totient is φ = 165237408.

The previous prime is 199662037. The next prime is 199662079. The reversal of 199662071 is 170266991.

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

It is a de Polignac number, because none of the positive numbers 2^k-199662071 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (199662079) 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 7 ways as a sum of consecutive naturals, for example, 491576 + ... + 491981.

It is an arithmetic number, because the mean of its divisors is an integer number (29506740).

Almost surely, 2^199662071 is an apocalyptic number.

199662071 is a deficient number, since it is larger than the sum of its proper divisors (36391849).

199662071 is an equidigital number, since it uses as much as digits as its factorization.

199662071 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 983593.

The product of its (nonzero) digits is 40824, while the sum is 41.

The square root of 199662071 is about 14130.1829782915. The cubic root of 199662071 is about 584.4739918320.

The spelling of 199662071 in words is "one hundred ninety-nine million, six hundred sixty-two thousand, seventy-one".