1664001437 has 24 divisors (see below), whose sum is σ = 2042533440. Its totient is φ = 1347917760.

The previous prime is 1664001397. The next prime is 1664001439. The reversal of 1664001437 is 7341004661.

It is not a de Polignac number, because 1664001437 - 2²⁶ = 1596892573 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1664001439) 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 23 ways as a sum of consecutive naturals, for example, 423512 + ... + 427422.

It is an arithmetic number, because the mean of its divisors is an integer number (85105560).

Almost surely, 2^1664001437 is an apocalyptic number.

It is an amenable number.

1664001437 is a deficient number, since it is larger than the sum of its proper divisors (378532003).

1664001437 is a wasteful number, since it uses less digits than its factorization.

1664001437 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4401 (or 4394 counting only the distinct ones).

The product of its (nonzero) digits is 12096, while the sum is 32.

The square root of 1664001437 is about 40792.1737224189. The cubic root of 1664001437 is about 1184.9987684772.

The spelling of 1664001437 in words is "one billion, six hundred sixty-four million, one thousand, four hundred thirty-seven".