66256550 has 24 divisors (see below), whose sum is σ = 126107256. Its totient is φ = 25885440.

The previous prime is 66256543. The next prime is 66256571. The reversal of 66256550 is 5565266.

It is a plaindrome in base 11.

It is a self number, because there is not a number n which added to its sum of digits gives 66256550.

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, 13259 + ... + 17558.

It is an arithmetic number, because the mean of its divisors is an integer number (5254469).

Almost surely, 2^66256550 is an apocalyptic number.

66256550 is a deficient number, since it is larger than the sum of its proper divisors (59850706).

66256550 is a wasteful number, since it uses less digits than its factorization.

66256550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30872 (or 30867 counting only the distinct ones).

The product of its (nonzero) digits is 54000, while the sum is 35.

The square root of 66256550 is about 8139.8126514067. The cubic root of 66256550 is about 404.6469513842.

The spelling of 66256550 in words is "sixty-six million, two hundred fifty-six thousand, five hundred fifty".