199000660 has 24 divisors (see below), whose sum is σ = 418561416. Its totient is φ = 79474560.

The previous prime is 199000651. The next prime is 199000663. The reversal of 199000660 is 66000991.

It can be written as a sum of positive squares in 4 ways, for example, as 95531076 + 103469584 = 9774^2 + 10172^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (199000663) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5694 + ... + 20746.

It is an arithmetic number, because the mean of its divisors is an integer number (17440059).

Almost surely, 2^199000660 is an apocalyptic number.

199000660 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

199000660 is an abundant number, since it is smaller than the sum of its proper divisors (219560756).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

199000660 is a wasteful number, since it uses less digits than its factorization.

199000660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15723 (or 15721 counting only the distinct ones).

The product of its (nonzero) digits is 2916, while the sum is 31.

The square root of 199000660 is about 14106.7593727263. The cubic root of 199000660 is about 583.8278915178.

The spelling of 199000660 in words is "one hundred ninety-nine million, six hundred sixty", and thus it is an aban number.