655661517 has 8 divisors (see below), whose sum is σ = 999103296. Its totient is φ = 374663712.

The previous prime is 655661477. The next prime is 655661533. The reversal of 655661517 is 715166556.

655661517 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 655661517 - 2⁶ = 655661453 is a prime.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (655662517) 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, 15610968 + ... + 15611009.

It is an arithmetic number, because the mean of its divisors is an integer number (124887912).

Almost surely, 2^655661517 is an apocalyptic number.

It is an amenable number.

655661517 is a deficient number, since it is larger than the sum of its proper divisors (343441779).

655661517 is a wasteful number, since it uses less digits than its factorization.

655661517 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31221987.

The product of its digits is 189000, while the sum is 42.

The square root of 655661517 is about 25605.8883267111. Note that the first 3 decimals coincide. The cubic root of 655661517 is about 868.7468270194.

The spelling of 655661517 in words is "six hundred fifty-five million, six hundred sixty-one thousand, five hundred seventeen".