66255486 has 48 divisors (see below), whose sum is σ = 146627712. Its totient is φ = 19943440.

The previous prime is 66255481. The next prime is 66255487. The reversal of 66255486 is 68455266.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66255481) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 190765 + ... + 191111.

It is an arithmetic number, because the mean of its divisors is an integer number (3054744).

Almost surely, 2^66255486 is an apocalyptic number.

66255486 is a gapful number since it is divisible by the number (66) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 66255486, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (73313856).

66255486 is an abundant number, since it is smaller than the sum of its proper divisors (80372226).

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

66255486 is a wasteful number, since it uses less digits than its factorization.

66255486 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 637 (or 626 counting only the distinct ones).

The product of its digits is 345600, while the sum is 42.

The square root of 66255486 is about 8139.7472933747. The cubic root of 66255486 is about 404.6447853258.

It can be divided in two parts, 66 and 255486, that added together give a palindrome (255552).

The spelling of 66255486 in words is "sixty-six million, two hundred fifty-five thousand, four hundred eighty-six".