6653985 has 16 divisors (see below), whose sum is σ = 11465664. Its totient is φ = 3275712.

The previous prime is 6653957. The next prime is 6653989. The reversal of 6653985 is 5893566.

It is not a de Polignac number, because 6653985 - 2⁶ = 6653921 is a prime.

It is not an unprimeable number, because it can be changed into a prime (6653989) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 16867 + ... + 17256.

It is an arithmetic number, because the mean of its divisors is an integer number (716604).

Almost surely, 2^6653985 is an apocalyptic number.

6653985 is a gapful number since it is divisible by the number (65) formed by its first and last digit.

It is an amenable number.

6653985 is a deficient number, since it is larger than the sum of its proper divisors (4811679).

6653985 is a wasteful number, since it uses less digits than its factorization.

6653985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34144.

The product of its digits is 194400, while the sum is 42.

The square root of 6653985 is about 2579.5319342858. The cubic root of 6653985 is about 188.0877909728.

The spelling of 6653985 in words is "six million, six hundred fifty-three thousand, nine hundred eighty-five".