664244203 has 4 divisors (see below), whose sum is σ = 759136240. Its totient is φ = 569352168.

The previous prime is 664244197. The next prime is 664244227. The reversal of 664244203 is 302442466.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 664244203 - 2⁹ = 664243691 is a prime.

It is a super-2 number, since 2×664244203² = 882440722438210418, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (664244293) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 47446008 + ... + 47446021.

It is an arithmetic number, because the mean of its divisors is an integer number (189784060).

Almost surely, 2^664244203 is an apocalyptic number.

664244203 is a deficient number, since it is larger than the sum of its proper divisors (94892037).

664244203 is an equidigital number, since it uses as much as digits as its factorization.

664244203 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 94892036.

The product of its (nonzero) digits is 27648, while the sum is 31.

The square root of 664244203 is about 25772.9354750288. The cubic root of 664244203 is about 872.5210720603.

Adding to 664244203 its reverse (302442466), we get a palindrome (966686669).

The spelling of 664244203 in words is "six hundred sixty-four million, two hundred forty-four thousand, two hundred three".