1664124437 has 2 divisors, whose sum is σ = 1664124438. Its totient is φ = 1664124436.

The previous prime is 1664124421. The next prime is 1664124457. The reversal of 1664124437 is 7344214661.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1641789361 + 22335076 = 40519^2 + 4726^2 .

It is a cyclic number.

It is not a de Polignac number, because 1664124437 - 2⁴ = 1664124421 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1664124437.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1664124457) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 832062218 + 832062219.

It is an arithmetic number, because the mean of its divisors is an integer number (832062219).

Almost surely, 2^1664124437 is an apocalyptic number.

It is an amenable number.

1664124437 is a deficient number, since it is larger than the sum of its proper divisors (1).

1664124437 is an equidigital number, since it uses as much as digits as its factorization.

1664124437 is an evil number, because the sum of its binary digits is even.

The product of its digits is 96768, while the sum is 38.

The square root of 1664124437 is about 40793.6813366972. The cubic root of 1664124437 is about 1185.0279654186.

The spelling of 1664124437 in words is "one billion, six hundred sixty-four million, one hundred twenty-four thousand, four hundred thirty-seven".