990664175 has 12 divisors (see below), whose sum is σ = 1234794480. Its totient is φ = 788421120.

The previous prime is 990664163. The next prime is 990664177. The reversal of 990664175 is 571466099.

It is not a de Polignac number, because 990664175 - 2⁶ = 990664111 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (990664177) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 97835 + ... + 107484.

It is an arithmetic number, because the mean of its divisors is an integer number (102899540).

Almost surely, 2^990664175 is an apocalyptic number.

990664175 is a deficient number, since it is larger than the sum of its proper divisors (244130305).

990664175 is a wasteful number, since it uses less digits than its factorization.

990664175 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 205522 (or 205517 counting only the distinct ones).

The product of its (nonzero) digits is 408240, while the sum is 47.

The square root of 990664175 is about 31474.8181090852. The cubic root of 990664175 is about 996.8783236100.

The spelling of 990664175 in words is "nine hundred ninety million, six hundred sixty-four thousand, one hundred seventy-five".