3405844665 has 20 divisors (see below), whose sum is σ = 6105292644. Its totient is φ = 1816450272.

The previous prime is 3405844657. The next prime is 3405844769. The reversal of 3405844665 is 5664485043.

3405844665 is a `hidden beast` number, since 3 + 4 + 0 + 584 + 4 + 6 + 65 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 802702224 + 2603142441 = 28332^2 + 51021^2 .

It is not a de Polignac number, because 3405844665 - 2³ = 3405844657 is a prime.

It is a hoax number, since the sum of its digits (45) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 3405844665.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 4204342 + ... + 4205151.

Almost surely, 2^3405844665 is an apocalyptic number.

It is an amenable number.

3405844665 is a deficient number, since it is larger than the sum of its proper divisors (2699447979).

3405844665 is an equidigital number, since it uses as much as digits as its factorization.

3405844665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8409510 (or 8409501 counting only the distinct ones).

The product of its (nonzero) digits is 1382400, while the sum is 45.

The square root of 3405844665 is about 58359.6150175787. The cubic root of 3405844665 is about 1504.5557295444. Note that the first 3 decimals are identical.

The spelling of 3405844665 in words is "three billion, four hundred five million, eight hundred forty-four thousand, six hundred sixty-five".