65605550 has 48 divisors (see below), whose sum is σ = 130973760. Its totient is φ = 24360960.

The previous prime is 65605543. The next prime is 65605559. The reversal of 65605550 is 5550656.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65605559) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 66662 + ... + 67638.

It is an arithmetic number, because the mean of its divisors is an integer number (2728620).

Almost surely, 2^65605550 is an apocalyptic number.

65605550 is a deficient number, since it is larger than the sum of its proper divisors (65368210).

65605550 is a wasteful number, since it uses less digits than its factorization.

65605550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1085 (or 1080 counting only the distinct ones).

The product of its (nonzero) digits is 22500, while the sum is 32.

The square root of 65605550 is about 8099.7253039841. The cubic root of 65605550 is about 403.3173084421.

The spelling of 65605550 in words is "sixty-five million, six hundred five thousand, five hundred fifty".