66543010 has 16 divisors (see below), whose sum is σ = 119884536. Its totient is φ = 26593408.

The previous prime is 66542951. The next prime is 66543011. The reversal of 66543010 is 1034566.

It can be written as a sum of positive squares in 4 ways, for example, as 65076489 + 1466521 = 8067^2 + 1211^2 .

It is not an unprimeable number, because it can be changed into a prime (66543011) 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, 12702 + ... + 17158.

Almost surely, 2^66543010 is an apocalyptic number.

66543010 is a deficient number, since it is larger than the sum of its proper divisors (53341526).

66543010 is a wasteful number, since it uses less digits than its factorization.

66543010 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5957.

The product of its (nonzero) digits is 2160, while the sum is 25.

The square root of 66543010 is about 8157.3899011878. The cubic root of 66543010 is about 405.2292762654.

Adding to 66543010 its reverse (1034566), we get a palindrome (67577576).

The spelling of 66543010 in words is "sixty-six million, five hundred forty-three thousand, ten".