1641666632 has 16 divisors (see below), whose sum is σ = 3120292140. Its totient is φ = 809588736.

The previous prime is 1641666617. The next prime is 1641666647. The reversal of 1641666632 is 2366661461.

It is an interprime number because it is at equal distance from previous prime (1641666617) and next prime (1641666647).

It can be written as a sum of positive squares in 2 ways, for example, as 1633291396 + 8375236 = 40414^2 + 2894^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 1641666632.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1404953 + ... + 1406120.

Almost surely, 2^1641666632 is an apocalyptic number.

It is an amenable number.

1641666632 is a deficient number, since it is larger than the sum of its proper divisors (1478625508).

1641666632 is a wasteful number, since it uses less digits than its factorization.

1641666632 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2811152 (or 2811148 counting only the distinct ones).

The product of its digits is 186624, while the sum is 41.

The square root of 1641666632 is about 40517.4855093452. The cubic root of 1641666632 is about 1179.6730474040.

The spelling of 1641666632 in words is "one billion, six hundred forty-one million, six hundred sixty-six thousand, six hundred thirty-two".