1660632329 has 2 divisors, whose sum is σ = 1660632330. Its totient is φ = 1660632328.

The previous prime is 1660632317. The next prime is 1660632353. The reversal of 1660632329 is 9232360661.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1271635600 + 388996729 = 35660^2 + 19723^2 .

It is a cyclic number.

It is not a de Polignac number, because 1660632329 - 2⁴ = 1660632313 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1660632292 and 1660632301.

It is not a weakly prime, because it can be changed into another prime (1660632929) 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 as a sum of consecutive naturals, namely, 830316164 + 830316165.

It is an arithmetic number, because the mean of its divisors is an integer number (830316165).

Almost surely, 2^1660632329 is an apocalyptic number.

It is an amenable number.

1660632329 is a deficient number, since it is larger than the sum of its proper divisors (1).

1660632329 is an equidigital number, since it uses as much as digits as its factorization.

1660632329 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 69984, while the sum is 38.

The square root of 1660632329 is about 40750.8567885388. The cubic root of 1660632329 is about 1184.1984714254.

The spelling of 1660632329 in words is "one billion, six hundred sixty million, six hundred thirty-two thousand, three hundred twenty-nine".