664247198 has 8 divisors (see below), whose sum is σ = 1015170408. Its totient is φ = 325857064.

The previous prime is 664247197. The next prime is 664247209. The reversal of 664247198 is 891742466.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (664247197) 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, 3133136 + ... + 3133347.

It is an arithmetic number, because the mean of its divisors is an integer number (126896301).

Almost surely, 2^664247198 is an apocalyptic number.

664247198 is a deficient number, since it is larger than the sum of its proper divisors (350923210).

664247198 is a wasteful number, since it uses less digits than its factorization.

664247198 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6266538.

The product of its digits is 580608, while the sum is 47.

The square root of 664247198 is about 25772.9935785504. The cubic root of 664247198 is about 872.5223834237.

The spelling of 664247198 in words is "six hundred sixty-four million, two hundred forty-seven thousand, one hundred ninety-eight".