655867712 has 56 divisors (see below), whose sum is σ = 1351864200. Its totient is φ = 315334656.

The previous prime is 655867687. The next prime is 655867721. The reversal of 655867712 is 217768556.

It can be written as a sum of positive squares in 4 ways, for example, as 24049216 + 631818496 = 4904^2 + 25136^2 .

It is a super-2 number, since 2×655867712² = 860324911288229888, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 580364 + ... + 581492.

Almost surely, 2^655867712 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 655867712, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (675932100).

655867712 is an abundant number, since it is smaller than the sum of its proper divisors (695996488).

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

655867712 is a wasteful number, since it uses less digits than its factorization.

655867712 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1483 (or 1473 counting only the distinct ones).

The product of its digits is 705600, while the sum is 47.

The square root of 655867712 is about 25609.9143301964. The cubic root of 655867712 is about 868.8378864420.

The spelling of 655867712 in words is "six hundred fifty-five million, eight hundred sixty-seven thousand, seven hundred twelve".