655679985 has 16 divisors (see below), whose sum is σ = 1050382464. Its totient is φ = 349264512.

The previous prime is 655679957. The next prime is 655679993. The reversal of 655679985 is 589976556.

655679985 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 655679985 - 2¹¹ = 655677937 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14212 + ... + 38901.

It is an arithmetic number, because the mean of its divisors is an integer number (65648904).

Almost surely, 2^655679985 is an apocalyptic number.

It is an amenable number.

655679985 is a deficient number, since it is larger than the sum of its proper divisors (394702479).

655679985 is a wasteful number, since it uses less digits than its factorization.

655679985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53944.

The product of its digits is 20412000, while the sum is 60.

The square root of 655679985 is about 25606.2489443495. The cubic root of 655679985 is about 868.7549835989.

The spelling of 655679985 in words is "six hundred fifty-five million, six hundred seventy-nine thousand, nine hundred eighty-five".