66056550 has 96 divisors (see below), whose sum is σ = 190916352. Its totient is φ = 14801280.

The previous prime is 66056539. The next prime is 66056563. The reversal of 66056550 is 5565066.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 55057 + ... + 56243.

It is an arithmetic number, because the mean of its divisors is an integer number (1988712).

Almost surely, 2^66056550 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 66056550, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (95458176).

66056550 is an abundant number, since it is smaller than the sum of its proper divisors (124859802).

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

66056550 is a wasteful number, since it uses less digits than its factorization.

66056550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1262 (or 1257 counting only the distinct ones).

The product of its (nonzero) digits is 27000, while the sum is 33.

The square root of 66056550 is about 8127.5180713426. The cubic root of 66056550 is about 404.2393893774.

The spelling of 66056550 in words is "sixty-six million, fifty-six thousand, five hundred fifty".