655841720 has 16 divisors (see below), whose sum is σ = 1475643960. Its totient is φ = 262336672.

The previous prime is 655841707. The next prime is 655841729. The reversal of 655841720 is 27148556.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (655841729) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8197982 + ... + 8198061.

Almost surely, 2^655841720 is an apocalyptic number.

It is an amenable number.

655841720 is an abundant number, since it is smaller than the sum of its proper divisors (819802240).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

655841720 is a wasteful number, since it uses less digits than its factorization.

655841720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16396054 (or 16396050 counting only the distinct ones).

The product of its (nonzero) digits is 67200, while the sum is 38.

The square root of 655841720 is about 25609.4068654469. The cubic root of 655841720 is about 868.8264089584.

The spelling of 655841720 in words is "six hundred fifty-five million, eight hundred forty-one thousand, seven hundred twenty".