199770664 has 8 divisors (see below), whose sum is σ = 374570010. Its totient is φ = 99885328.

The previous prime is 199770643. The next prime is 199770743. The reversal of 199770664 is 466077991.

It can be written as a sum of positive squares in only one way, i.e., 178222500 + 21548164 = 13350^2 + 4642^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12485659 + ... + 12485674.

Almost surely, 2^199770664 is an apocalyptic number.

It is an amenable number.

199770664 is a deficient number, since it is larger than the sum of its proper divisors (174799346).

199770664 is a wasteful number, since it uses less digits than its factorization.

199770664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24971339 (or 24971335 counting only the distinct ones).

The product of its (nonzero) digits is 571536, while the sum is 49.

The square root of 199770664 is about 14134.0250459662. The cubic root of 199770664 is about 584.5799346393.

The spelling of 199770664 in words is "one hundred ninety-nine million, seven hundred seventy thousand, six hundred sixty-four".