66068645 has 8 divisors (see below), whose sum is σ = 80067960. Its totient is φ = 52331200.

The previous prime is 66068623. The next prime is 66068659. The reversal of 66068645 is 54686066.

It can be written as a sum of positive squares in 4 ways, for example, as 10252804 + 55815841 = 3202^2 + 7471^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 66068645 - 2¹² = 66064549 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 64910 + ... + 65919.

It is an arithmetic number, because the mean of its divisors is an integer number (10008495).

Almost surely, 2^66068645 is an apocalyptic number.

It is an amenable number.

66068645 is a deficient number, since it is larger than the sum of its proper divisors (13999315).

66068645 is a wasteful number, since it uses less digits than its factorization.

66068645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 130935.

The product of its (nonzero) digits is 207360, while the sum is 41.

The square root of 66068645 is about 8128.2621143760. The cubic root of 66068645 is about 404.2640600423.

It can be divided in two parts, 6606 and 8645, that added together give a palindrome (15251).

The spelling of 66068645 in words is "sixty-six million, sixty-eight thousand, six hundred forty-five".