53666785 has 8 divisors (see below), whose sum is σ = 64631016. Its totient is φ = 42779520.

The previous prime is 53666783. The next prime is 53666803. The reversal of 53666785 is 58766635.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 5683456 + 47983329 = 2384^2 + 6927^2 .

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

It is not a de Polignac number, because 53666785 - 2¹ = 53666783 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (53666783) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17694 + ... + 20503.

It is an arithmetic number, because the mean of its divisors is an integer number (8078877).

Almost surely, 2^53666785 is an apocalyptic number.

It is an amenable number.

53666785 is a deficient number, since it is larger than the sum of its proper divisors (10964231).

53666785 is a wasteful number, since it uses less digits than its factorization.

53666785 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38483.

The product of its digits is 907200, while the sum is 46.

The square root of 53666785 is about 7325.7617351372. The cubic root of 53666785 is about 377.1972573849.

The spelling of 53666785 in words is "fifty-three million, six hundred sixty-six thousand, seven hundred eighty-five".