1646871466 has 12 divisors (see below), whose sum is σ = 2552568066. Its totient is φ = 796872360.

The previous prime is 1646871463. The next prime is 1646871467. The reversal of 1646871466 is 6641786461.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 1646655241 + 216225 = 40579^2 + 465^2 .

It is not an unprimeable number, because it can be changed into a prime (1646871463) 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 5 ways as a sum of consecutive naturals, for example, 426505 + ... + 430348.

Almost surely, 2^1646871466 is an apocalyptic number.

1646871466 is a deficient number, since it is larger than the sum of its proper divisors (905696600).

1646871466 is an equidigital number, since it uses as much as digits as its factorization.

1646871466 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 856917 (or 856886 counting only the distinct ones).

The product of its digits is 1161216, while the sum is 49.

The square root of 1646871466 is about 40581.6641600613. The cubic root of 1646871466 is about 1180.9184332007.

The spelling of 1646871466 in words is "one billion, six hundred forty-six million, eight hundred seventy-one thousand, four hundred sixty-six".