66286845 has 12 divisors (see below), whose sum is σ = 114897276. Its totient is φ = 35352960.

The previous prime is 66286823. The next prime is 66286861. The reversal of 66286845 is 54868266.

It can be written as a sum of positive squares in 2 ways, for example, as 37675044 + 28611801 = 6138^2 + 5349^2 .

It is not a de Polignac number, because 66286845 - 2⁹ = 66286333 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45), and also a Moran number because the ratio is a prime number: 1473041 = 66286845 / (6 + 6 + 2 + 8 + 6 + 8 + 4 + 5).

It is a self number, because there is not a number n which added to its sum of digits gives 66286845.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 736476 + ... + 736565.

It is an arithmetic number, because the mean of its divisors is an integer number (9574773).

Almost surely, 2^66286845 is an apocalyptic number.

It is an amenable number.

66286845 is a deficient number, since it is larger than the sum of its proper divisors (48610431).

66286845 is a wasteful number, since it uses less digits than its factorization.

66286845 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1473052 (or 1473049 counting only the distinct ones).

The product of its digits is 552960, while the sum is 45.

The square root of 66286845 is about 8141.6733538014. The cubic root of 66286845 is about 404.7086152824.

The spelling of 66286845 in words is "sixty-six million, two hundred eighty-six thousand, eight hundred forty-five".