66346550 has 24 divisors (see below), whose sum is σ = 126743376. Its totient is φ = 25820640.

The previous prime is 66346547. The next prime is 66346591. The reversal of 66346550 is 5564366.

It is a self number, because there is not a number n which added to its sum of digits gives 66346550.

It is a congruent 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, 16082 + ... + 19781.

It is an arithmetic number, because the mean of its divisors is an integer number (5280974).

Almost surely, 2^66346550 is an apocalyptic number.

66346550 is a deficient number, since it is larger than the sum of its proper divisors (60396826).

66346550 is a wasteful number, since it uses less digits than its factorization.

66346550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35912 (or 35907 counting only the distinct ones).

The product of its (nonzero) digits is 64800, while the sum is 35.

The square root of 66346550 is about 8145.3391580707. The cubic root of 66346550 is about 404.8300867291.

The spelling of 66346550 in words is "sixty-six million, three hundred forty-six thousand, five hundred fifty".