199922665 has 8 divisors (see below), whose sum is σ = 248180040. Its totient is φ = 154422912.

The previous prime is 199922633. The next prime is 199922713. The reversal of 199922665 is 566229991.

It can be written as a sum of positive squares in 4 ways, for example, as 1225449 + 198697216 = 1107^2 + 14096^2 .

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

It is not a de Polignac number, because 199922665 - 2⁵ = 199922633 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 689244 + ... + 689533.

It is an arithmetic number, because the mean of its divisors is an integer number (31022505).

Almost surely, 2^199922665 is an apocalyptic number.

It is an amenable number.

199922665 is a deficient number, since it is larger than the sum of its proper divisors (48257375).

199922665 is a wasteful number, since it uses less digits than its factorization.

199922665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1378811.

The product of its digits is 524880, while the sum is 49.

The square root of 199922665 is about 14139.4011542215. The cubic root of 199922665 is about 584.7281616212.

The spelling of 199922665 in words is "one hundred ninety-nine million, nine hundred twenty-two thousand, six hundred sixty-five".