2664001 has 2 divisors, whose sum is σ = 2664002. Its totient is φ = 2664000.

The previous prime is 2663993. The next prime is 2664017. The reversal of 2664001 is 1004662.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2624400 + 39601 = 1620^2 + 199^2 .

It is a cyclic number.

It is not a de Polignac number, because 2664001 - 2³ = 2663993 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2664001.

It is not a weakly prime, because it can be changed into another prime (2664041) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1332000 + 1332001.

It is an arithmetic number, because the mean of its divisors is an integer number (1332001).

2^2664001 is an apocalyptic number.

It is an amenable number.

2664001 is a deficient number, since it is larger than the sum of its proper divisors (1).

2664001 is an equidigital number, since it uses as much as digits as its factorization.

2664001 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 288, while the sum is 19.

The square root of 2664001 is about 1632.1767673877. The cubic root of 2664001 is about 138.6260327142.

Adding to 2664001 its reverse (1004662), we get a palindrome (3668663).

The spelling of 2664001 in words is "two million, six hundred sixty-four thousand, one".