664333001 has 2 divisors, whose sum is σ = 664333002. Its totient is φ = 664333000.

The previous prime is 664332983. The next prime is 664333037. The reversal of 664333001 is 100333466.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 608904976 + 55428025 = 24676^2 + 7445^2 .

It is a cyclic number.

It is not a de Polignac number, because 664333001 - 2²² = 660138697 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (664333801) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 332166500 + 332166501.

It is an arithmetic number, because the mean of its divisors is an integer number (332166501).

Almost surely, 2^664333001 is an apocalyptic number.

It is an amenable number.

664333001 is a deficient number, since it is larger than the sum of its proper divisors (1).

664333001 is an equidigital number, since it uses as much as digits as its factorization.

664333001 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3888, while the sum is 26.

The square root of 664333001 is about 25774.6581160643. The cubic root of 664333001 is about 872.5599506703.

Adding to 664333001 its reverse (100333466), we get a palindrome (764666467).

The spelling of 664333001 in words is "six hundred sixty-four million, three hundred thirty-three thousand, one".