65505550 has 24 divisors (see below), whose sum is σ = 132917832. Its totient is φ = 23820000.

The previous prime is 65505527. The next prime is 65505553. The reversal of 65505550 is 5550556.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65505553) 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, 59001 + ... + 60100.

It is an arithmetic number, because the mean of its divisors is an integer number (5538243).

Almost surely, 2^65505550 is an apocalyptic number.

65505550 is an abundant number, since it is smaller than the sum of its proper divisors (67412282).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

65505550 is a wasteful number, since it uses less digits than its factorization.

65505550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 119124 (or 119119 counting only the distinct ones).

The product of its (nonzero) digits is 18750, while the sum is 31.

The square root of 65505550 is about 8093.5499010014. The cubic root of 65505550 is about 403.1122839167.

It can be divided in two parts, 6550 and 5550, that added together give a square (12100 = 110²).

The spelling of 65505550 in words is "sixty-five million, five hundred five thousand, five hundred fifty".