1664056001 has 4 divisors (see below), whose sum is σ = 1692260400. Its totient is φ = 1635851604.

The previous prime is 1664055983. The next prime is 1664056013. The reversal of 1664056001 is 1006504661.

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 a cyclic number.

It is not a de Polignac number, because 1664056001 - 2⁶ = 1664055937 is a prime.

It is a super-2 number, since 2×1664056001² = 5538164748928224002, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1664056201) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14102111 + ... + 14102228.

It is an arithmetic number, because the mean of its divisors is an integer number (423065100).

Almost surely, 2^1664056001 is an apocalyptic number.

It is an amenable number.

1664056001 is a deficient number, since it is larger than the sum of its proper divisors (28204399).

1664056001 is an equidigital number, since it uses as much as digits as its factorization.

1664056001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28204398.

The product of its (nonzero) digits is 4320, while the sum is 29.

The square root of 1664056001 is about 40792.8425216974. The cubic root of 1664056001 is about 1185.0117207028.

The spelling of 1664056001 in words is "one billion, six hundred sixty-four million, fifty-six thousand, one".