53666685 has 32 divisors (see below), whose sum is σ = 95775360. Its totient is φ = 28512000.

The previous prime is 53666677. The next prime is 53666689. The reversal of 53666685 is 58666635.

It is not a de Polignac number, because 53666685 - 2³ = 53666677 is a prime.

It is a super-2 number, since 2×53666685² = 5760226157778450, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 53666685.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (53666689) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 44085 + ... + 45285.

It is an arithmetic number, because the mean of its divisors is an integer number (2992980).

Almost surely, 2^53666685 is an apocalyptic number.

It is an amenable number.

53666685 is a deficient number, since it is larger than the sum of its proper divisors (42108675).

53666685 is a wasteful number, since it uses less digits than its factorization.

53666685 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1546 (or 1540 counting only the distinct ones).

The product of its digits is 777600, while the sum is 45.

The square root of 53666685 is about 7325.7549099052. The cubic root of 53666685 is about 377.1970231013.

The spelling of 53666685 in words is "fifty-three million, six hundred sixty-six thousand, six hundred eighty-five".