5408686665 has 12 divisors (see below), whose sum is σ = 9375056964. Its totient is φ = 2884632864.

The previous prime is 5408686643. The next prime is 5408686669. The reversal of 5408686665 is 5666868045.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 2495601936 + 2913084729 = 49956^2 + 53973^2 .

It is not a de Polignac number, because 5408686665 - 2¹⁶ = 5408621129 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (5408686669) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 60096474 + ... + 60096563.

It is an arithmetic number, because the mean of its divisors is an integer number (781254747).

Almost surely, 2^5408686665 is an apocalyptic number.

It is an amenable number.

5408686665 is a deficient number, since it is larger than the sum of its proper divisors (3966370299).

5408686665 is a wasteful number, since it uses less digits than its factorization.

5408686665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 120193048 (or 120193045 counting only the distinct ones).

The product of its (nonzero) digits is 8294400, while the sum is 54.

The square root of 5408686665 is about 73543.7738017298. The cubic root of 5408686665 is about 1755.3508782941.

The spelling of 5408686665 in words is "five billion, four hundred eight million, six hundred eighty-six thousand, six hundred sixty-five".