55003665 has 32 divisors (see below), whose sum is σ = 91808640. Its totient is φ = 28094976.

The previous prime is 55003643. The next prime is 55003667. The reversal of 55003665 is 56630055.

55003665 = 19² + 20² + ... + 548².

It is not a de Polignac number, because 55003665 - 2⁸ = 55003409 is a prime.

It is not an unprimeable number, because it can be changed into a prime (55003667) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 33381 + ... + 34989.

It is an arithmetic number, because the mean of its divisors is an integer number (2869020).

Almost surely, 2^55003665 is an apocalyptic number.

It is an amenable number.

55003665 is a deficient number, since it is larger than the sum of its proper divisors (36804975).

55003665 is a wasteful number, since it uses less digits than its factorization.

55003665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1713.

The product of its (nonzero) digits is 13500, while the sum is 30.

The square root of 55003665 is about 7416.4455772290. The cubic root of 55003665 is about 380.3036930526.

The spelling of 55003665 in words is "fifty-five million, three thousand, six hundred sixty-five".