655755870 has 192 divisors, whose sum is σ = 2002226688. Its totient is φ = 134534400.

The previous prime is 655755869. The next prime is 655755871. The reversal of 655755870 is 78557556.

It is an interprime number because it is at equal distance from previous prime (655755869) and next prime (655755871).

It is a super-2 number, since 2×655755870² = 860031522078913800, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (655755871) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 3328612 + ... + 3328808.

It is an arithmetic number, because the mean of its divisors is an integer number (10428264).

Almost surely, 2^655755870 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 655755870, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1001113344).

655755870 is an abundant number, since it is smaller than the sum of its proper divisors (1346470818).

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

655755870 is a wasteful number, since it uses less digits than its factorization.

655755870 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 367 (or 356 counting only the distinct ones).

The product of its (nonzero) digits is 1470000, while the sum is 48.

The square root of 655755870 is about 25607.7306686868. The cubic root of 655755870 is about 868.7884973710.

The spelling of 655755870 in words is "six hundred fifty-five million, seven hundred fifty-five thousand, eight hundred seventy".