1671090665 has 16 divisors (see below), whose sum is σ = 2022585600. Its totient is φ = 1325382912.

The previous prime is 1671090661. The next prime is 1671090703. The reversal of 1671090665 is 5660901761.

It is a cyclic number.

It is not a de Polignac number, because 1671090665 - 2² = 1671090661 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1671090661) 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 15 ways as a sum of consecutive naturals, for example, 700064 + ... + 702446.

It is an arithmetic number, because the mean of its divisors is an integer number (126411600).

Almost surely, 2^1671090665 is an apocalyptic number.

It is an amenable number.

1671090665 is a deficient number, since it is larger than the sum of its proper divisors (351494935).

1671090665 is a wasteful number, since it uses less digits than its factorization.

1671090665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3536.

The product of its (nonzero) digits is 68040, while the sum is 41.

The square root of 1671090665 is about 40878.9758311042. The cubic root of 1671090665 is about 1186.6792206709.

The spelling of 1671090665 in words is "one billion, six hundred seventy-one million, ninety thousand, six hundred sixty-five".