664236201 has 4 divisors (see below), whose sum is σ = 885648272. Its totient is φ = 442824132.

The previous prime is 664236197. The next prime is 664236211. The reversal of 664236201 is 102632466.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 664236201 - 2² = 664236197 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (664236211) 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, 110706031 + ... + 110706036.

It is an arithmetic number, because the mean of its divisors is an integer number (221412068).

Almost surely, 2^664236201 is an apocalyptic number.

It is an amenable number.

664236201 is a deficient number, since it is larger than the sum of its proper divisors (221412071).

664236201 is a wasteful number, since it uses less digits than its factorization.

664236201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 221412070.

The product of its (nonzero) digits is 10368, while the sum is 30.

The square root of 664236201 is about 25772.7802341928. The cubic root of 664236201 is about 872.5175683581.

Adding to 664236201 its reverse (102632466), we get a palindrome (766868667).

The spelling of 664236201 in words is "six hundred sixty-four million, two hundred thirty-six thousand, two hundred one".