55540665 has 12 divisors (see below), whose sum is σ = 96270564. Its totient is φ = 29621664.

The previous prime is 55540651. The next prime is 55540703. The reversal of 55540665 is 56604555.

It is a happy number.

55540665 is a `hidden beast` number, since 55 + 540 + 6 + 65 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 41679936 + 13860729 = 6456^2 + 3723^2 .

It is not a de Polignac number, because 55540665 - 2⁶ = 55540601 is a prime.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 617074 + ... + 617163.

It is an arithmetic number, because the mean of its divisors is an integer number (8022547).

Almost surely, 2^55540665 is an apocalyptic number.

It is an amenable number.

55540665 is a deficient number, since it is larger than the sum of its proper divisors (40729899).

55540665 is a wasteful number, since it uses less digits than its factorization.

55540665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1234248 (or 1234245 counting only the distinct ones).

The product of its (nonzero) digits is 90000, while the sum is 36.

The square root of 55540665 is about 7452.5609692239. The cubic root of 55540665 is about 381.5373202762.

The spelling of 55540665 in words is "fifty-five million, five hundred forty thousand, six hundred sixty-five".