655686871 has 8 divisors (see below), whose sum is σ = 751139744. Its totient is φ = 560679840.

The previous prime is 655686853. The next prime is 655686881. The reversal of 655686871 is 178686556.

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

It is not a de Polignac number, because 655686871 - 2⁹ = 655686359 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (655686851) 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, 108300 + ... + 114193.

It is an arithmetic number, because the mean of its divisors is an integer number (93892468).

Almost surely, 2^655686871 is an apocalyptic number.

655686871 is a deficient number, since it is larger than the sum of its proper divisors (95452873).

655686871 is a wasteful number, since it uses less digits than its factorization.

655686871 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 222921.

The product of its digits is 2419200, while the sum is 52.

The square root of 655686871 is about 25606.3834033625. The cubic root of 655686871 is about 868.7580248314.

The spelling of 655686871 in words is "six hundred fifty-five million, six hundred eighty-six thousand, eight hundred seventy-one".