66015606 has 16 divisors (see below), whose sum is σ = 132115248. Its totient is φ = 21991200.

The previous prime is 66015553. The next prime is 66015619. The reversal of 66015606 is 60651066.

It is a zygodrome in base 5.

It is a congruent number.

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, 11976 + ... + 16596.

It is an arithmetic number, because the mean of its divisors is an integer number (8257203).

Almost surely, 2^66015606 is an apocalyptic number.

66015606 is an abundant number, since it is smaller than the sum of its proper divisors (66099642).

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

66015606 is a wasteful number, since it uses less digits than its factorization.

66015606 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7007.

The product of its (nonzero) digits is 6480, while the sum is 30.

The square root of 66015606 is about 8124.9988307691. The cubic root of 66015606 is about 404.1558518711.

The spelling of 66015606 in words is "sixty-six million, fifteen thousand, six hundred six".