1664908829 has 2 divisors, whose sum is σ = 1664908830. Its totient is φ = 1664908828.

The previous prime is 1664908813. The next prime is 1664908841. The reversal of 1664908829 is 9288094661.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1664803204 + 105625 = 40802^2 + 325^2 .

It is a cyclic number.

It is not a de Polignac number, because 1664908829 - 2⁴ = 1664908813 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1664908229) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 832454414 + 832454415.

It is an arithmetic number, because the mean of its divisors is an integer number (832454415).

Almost surely, 2^1664908829 is an apocalyptic number.

It is an amenable number.

1664908829 is a deficient number, since it is larger than the sum of its proper divisors (1).

1664908829 is an equidigital number, since it uses as much as digits as its factorization.

1664908829 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1492992, while the sum is 53.

The square root of 1664908829 is about 40803.2943400407. The cubic root of 1664908829 is about 1185.2141254653.

The spelling of 1664908829 in words is "one billion, six hundred sixty-four million, nine hundred eight thousand, eight hundred twenty-nine".