1671664897 has 16 divisors (see below), whose sum is σ = 2013107200. Its totient is φ = 1356037200.

The previous prime is 1671664889. The next prime is 1671664901. The reversal of 1671664897 is 7984661761.

It is not a de Polignac number, because 1671664897 - 2³ = 1671664889 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1671664867) 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 15 ways as a sum of consecutive naturals, for example, 133804 + ... + 145762.

It is an arithmetic number, because the mean of its divisors is an integer number (125819200).

Almost surely, 2^1671664897 is an apocalyptic number.

It is an amenable number.

1671664897 is a deficient number, since it is larger than the sum of its proper divisors (341442303).

1671664897 is a wasteful number, since it uses less digits than its factorization.

1671664897 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13036.

The product of its digits is 3048192, while the sum is 55.

The square root of 1671664897 is about 40885.9987893166. The cubic root of 1671664897 is about 1186.8151301419.

The spelling of 1671664897 in words is "one billion, six hundred seventy-one million, six hundred sixty-four thousand, eight hundred ninety-seven".