66613106 has 64 divisors (see below), whose sum is σ = 129558528. Its totient is φ = 25014528.

The previous prime is 66613097. The next prime is 66613111. The reversal of 66613106 is 60131666.

66613106 = 805² + 806² + ... + 896².

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 31 ways as a sum of consecutive naturals, for example, 235241 + ... + 235523.

It is an arithmetic number, because the mean of its divisors is an integer number (2024352).

Almost surely, 2^66613106 is an apocalyptic number.

66613106 is a deficient number, since it is larger than the sum of its proper divisors (62945422).

66613106 is a wasteful number, since it uses less digits than its factorization.

66613106 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 375.

The product of its (nonzero) digits is 3888, while the sum is 29.

The square root of 66613106 is about 8161.6852426444. The cubic root of 66613106 is about 405.3715150135.

The spelling of 66613106 in words is "sixty-six million, six hundred thirteen thousand, one hundred six".