664010194 has 8 divisors (see below), whose sum is σ = 997524108. Its totient is φ = 331502160.

The previous prime is 664010183. The next prime is 664010197. The reversal of 664010194 is 491010466.

It can be written as a sum of positive squares in 2 ways, for example, as 600887169 + 63123025 = 24513^2 + 7945^2 .

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

It is not an unprimeable number, because it can be changed into a prime (664010197) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 249817 + ... + 252460.

Almost surely, 2^664010194 is an apocalyptic number.

664010194 is a deficient number, since it is larger than the sum of its proper divisors (333513914).

664010194 is a wasteful number, since it uses less digits than its factorization.

664010194 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 502940.

The product of its (nonzero) digits is 5184, while the sum is 31.

The square root of 664010194 is about 25768.3952546525. The cubic root of 664010194 is about 872.4185988212.

The spelling of 664010194 in words is "six hundred sixty-four million, ten thousand, one hundred ninety-four".