1662682665 has 64 divisors (see below), whose sum is σ = 3155074560. Its totient is φ = 731566080.

The previous prime is 1662682661. The next prime is 1662682691. The reversal of 1662682665 is 5662862661.

It is not a de Polignac number, because 1662682665 - 2² = 1662682661 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1662682661) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1281297 + ... + 1282593.

It is an arithmetic number, because the mean of its divisors is an integer number (49298040).

Almost surely, 2^1662682665 is an apocalyptic number.

1662682665 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1662682665 is a deficient number, since it is larger than the sum of its proper divisors (1492391895).

1662682665 is a wasteful number, since it uses less digits than its factorization.

1662682665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1762.

The product of its digits is 1244160, while the sum is 48.

The square root of 1662682665 is about 40776.0059961738. The cubic root of 1662682665 is about 1184.6856364923.

The spelling of 1662682665 in words is "one billion, six hundred sixty-two million, six hundred eighty-two thousand, six hundred sixty-five".