66103566 has 16 divisors (see below), whose sum is σ = 133881600. Its totient is φ = 21755448.

The previous prime is 66103507. The next prime is 66103567. The reversal of 66103566 is 66530166.

66103566 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66103567) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 69256 + ... + 70203.

It is an arithmetic number, because the mean of its divisors is an integer number (8367600).

Almost surely, 2^66103566 is an apocalyptic number.

66103566 is an abundant number, since it is smaller than the sum of its proper divisors (67778034).

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

66103566 is a wasteful number, since it uses less digits than its factorization.

66103566 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 139543.

The product of its (nonzero) digits is 19440, while the sum is 33.

The square root of 66103566 is about 8130.4099527638. The cubic root of 66103566 is about 404.3352729387.

The spelling of 66103566 in words is "sixty-six million, one hundred three thousand, five hundred sixty-six".