65005550 has 12 divisors (see below), whose sum is σ = 120910416. Its totient is φ = 26002200.

The previous prime is 65005547. The next prime is 65005553. The reversal of 65005550 is 5550056.

It is an interprime number because it is at equal distance from previous prime (65005547) and next prime (65005553).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65005553) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 650006 + ... + 650105.

It is an arithmetic number, because the mean of its divisors is an integer number (10075868).

Almost surely, 2^65005550 is an apocalyptic number.

65005550 is a deficient number, since it is larger than the sum of its proper divisors (55904866).

65005550 is a wasteful number, since it uses less digits than its factorization.

65005550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1300123 (or 1300118 counting only the distinct ones).

The product of its (nonzero) digits is 3750, while the sum is 26.

The square root of 65005550 is about 8062.6019373401. The cubic root of 65005550 is about 402.0840191373.

The spelling of 65005550 in words is "sixty-five million, five thousand, five hundred fifty".