66548562 has 16 divisors (see below), whose sum is σ = 137687040. Its totient is φ = 21417872.

The previous prime is 66548561. The next prime is 66548639. The reversal of 66548562 is 26584566.

It is a super-2 number, since 2×66548562² = 8857422208535688, which contains 22 as substring.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (66548561) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 191058 + ... + 191405.

It is an arithmetic number, because the mean of its divisors is an integer number (8605440).

Almost surely, 2^66548562 is an apocalyptic number.

66548562 is an abundant number, since it is smaller than the sum of its proper divisors (71138478).

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

66548562 is a wasteful number, since it uses less digits than its factorization.

66548562 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 382497.

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

The square root of 66548562 is about 8157.7301990198. The cubic root of 66548562 is about 405.2405460210.

It can be divided in two parts, 66 and 548562, that added together give a triangular number (548628 = T₁₀₄₇).

The spelling of 66548562 in words is "sixty-six million, five hundred forty-eight thousand, five hundred sixty-two".