1664040001 has 8 divisors (see below), whose sum is σ = 1792667520. Its totient is φ = 1535501712.

The previous prime is 1664039989. The next prime is 1664040011. The reversal of 1664040001 is 1000404661.

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

It is a cyclic number.

It is not a de Polignac number, because 1664040001 - 2⁷ = 1664039873 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1664040011) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19320 + ... + 60838.

It is an arithmetic number, because the mean of its divisors is an integer number (224083440).

Almost surely, 2^1664040001 is an apocalyptic number.

It is an amenable number.

1664040001 is a deficient number, since it is larger than the sum of its proper divisors (128627519).

1664040001 is a wasteful number, since it uses less digits than its factorization.

1664040001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44615.

The product of its (nonzero) digits is 576, while the sum is 22.

The square root of 1664040001 is about 40792.6464083908. The cubic root of 1664040001 is about 1185.0079227039.

Adding to 1664040001 its reverse (1000404661), we get a palindrome (2664444662).

The spelling of 1664040001 in words is "one billion, six hundred sixty-four million, forty thousand, one".