1664580682 has 4 divisors (see below), whose sum is σ = 2496871026. Its totient is φ = 832290340.

The previous prime is 1664580677. The next prime is 1664580691. The reversal of 1664580682 is 2860854661.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 1597520961 + 67059721 = 39969^2 + 8189^2 .

It is an unprimeable number.

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, 416145169 + ... + 416145172.

Almost surely, 2^1664580682 is an apocalyptic number.

1664580682 is a deficient number, since it is larger than the sum of its proper divisors (832290344).

1664580682 is an equidigital number, since it uses as much as digits as its factorization.

1664580682 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 832290343.

The product of its (nonzero) digits is 552960, while the sum is 46.

The square root of 1664580682 is about 40799.2730572494. The cubic root of 1664580682 is about 1185.1362533305.

The spelling of 1664580682 in words is "one billion, six hundred sixty-four million, five hundred eighty thousand, six hundred eighty-two".