1664062525 has 12 divisors (see below), whose sum is σ = 2064025012. Its totient is φ = 1330871040.

The previous prime is 1664062511. The next prime is 1664062529. The reversal of 1664062525 is 5252604661.

It can be written as a sum of positive squares in 6 ways, for example, as 724578724 + 939483801 = 26918^2 + 30651^2 .

It is a de Polignac number, because none of the positive numbers 2^k-1664062525 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1664062529) 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 11 ways as a sum of consecutive naturals, for example, 109279 + ... + 123571.

Almost surely, 2^1664062525 is an apocalyptic number.

It is an amenable number.

1664062525 is a deficient number, since it is larger than the sum of its proper divisors (399962487).

1664062525 is a wasteful number, since it uses less digits than its factorization.

1664062525 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18960 (or 18955 counting only the distinct ones).

The product of its (nonzero) digits is 86400, while the sum is 37.

The square root of 1664062525 is about 40792.9224866275. The cubic root of 1664062525 is about 1185.0132693298.

The spelling of 1664062525 in words is "one billion, six hundred sixty-four million, sixty-two thousand, five hundred twenty-five".