199660190 has 16 divisors (see below), whose sum is σ = 361543392. Its totient is φ = 79385184.

The previous prime is 199660187. The next prime is 199660249. The reversal of 199660190 is 91066991.

It is a super-2 number, since 2×199660190² = 79728382941672200, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 58109 + ... + 61448.

It is an arithmetic number, because the mean of its divisors is an integer number (22596462).

Almost surely, 2^199660190 is an apocalyptic number.

199660190 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

199660190 is a deficient number, since it is larger than the sum of its proper divisors (161883202).

199660190 is a wasteful number, since it uses less digits than its factorization.

199660190 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 119731.

The product of its (nonzero) digits is 26244, while the sum is 41.

The square root of 199660190 is about 14130.1164184871. The cubic root of 199660190 is about 584.4721563990.

The spelling of 199660190 in words is "one hundred ninety-nine million, six hundred sixty thousand, one hundred ninety".