255951660 has 192 divisors, whose sum is σ = 818657280. Its totient is φ = 59351040.

The previous prime is 255951649. The next prime is 255951673. The reversal of 255951660 is 66159552.

255951660 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×255951660² = 131022504513511200, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 910720 + ... + 911000.

It is an arithmetic number, because the mean of its divisors is an integer number (4263840).

Almost surely, 2^255951660 is an apocalyptic number.

255951660 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 255951660, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (409328640).

255951660 is an abundant number, since it is smaller than the sum of its proper divisors (562705620).

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

255951660 is a wasteful number, since it uses less digits than its factorization.

255951660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 376 (or 374 counting only the distinct ones).

The product of its (nonzero) digits is 81000, while the sum is 39.

The square root of 255951660 is about 15998.4893036811. The cubic root of 255951660 is about 634.9204521429.

The spelling of 255951660 in words is "two hundred fifty-five million, nine hundred fifty-one thousand, six hundred sixty".