66224885 has 4 divisors (see below), whose sum is σ = 79469868. Its totient is φ = 52979904.

The previous prime is 66224867. The next prime is 66224903. The reversal of 66224885 is 58842266.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (66224867) and next prime (66224903).

It can be written as a sum of positive squares in 2 ways, for example, as 14485636 + 51739249 = 3806^2 + 7193^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-66224885 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6622484 + ... + 6622493.

It is an arithmetic number, because the mean of its divisors is an integer number (19867467).

Almost surely, 2^66224885 is an apocalyptic number.

It is an amenable number.

66224885 is a deficient number, since it is larger than the sum of its proper divisors (13244983).

66224885 is a wasteful number, since it uses less digits than its factorization.

66224885 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13244982.

The product of its digits is 184320, while the sum is 41.

The square root of 66224885 is about 8137.8673496193. The cubic root of 66224885 is about 404.5824788278.

The spelling of 66224885 in words is "sixty-six million, two hundred twenty-four thousand, eight hundred eighty-five".