66054500 has 24 divisors (see below), whose sum is σ = 144264120. Its totient is φ = 26421600.

The previous prime is 66054491. The next prime is 66054533. The reversal of 66054500 is 545066.

It can be written as a sum of positive squares in 4 ways, for example, as 87616 + 65966884 = 296^2 + 8122^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 66054500.

It is an unprimeable number.

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, 65555 + ... + 66554.

It is an arithmetic number, because the mean of its divisors is an integer number (6011005).

Almost surely, 2^66054500 is an apocalyptic number.

It is an amenable number.

66054500 is an abundant number, since it is smaller than the sum of its proper divisors (78209620).

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

66054500 is a wasteful number, since it uses less digits than its factorization.

66054500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 132128 (or 132116 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 26.

The square root of 66054500 is about 8127.3919556030. The cubic root of 66054500 is about 404.2352076103.

Adding to 66054500 its reverse (545066), we get a palindrome (66599566).

It can be divided in two parts, 6 and 6054500, that added together give a palindrome (6054506).

The spelling of 66054500 in words is "sixty-six million, fifty-four thousand, five hundred".