660854256 has 80 divisors (see below), whose sum is σ = 1733889024. Its totient is φ = 216870912.

The previous prime is 660854251. The next prime is 660854267. The reversal of 660854256 is 652458066.

It is a super-4 number, since 4×660854256⁴ (a number of 36 digits) contains 4444 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (660854251) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1145040 + ... + 1145616.

Almost surely, 2^660854256 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 660854256, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (866944512).

660854256 is an abundant number, since it is smaller than the sum of its proper divisors (1073034768).

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

660854256 is a wasteful number, since it uses less digits than its factorization.

660854256 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 918 (or 912 counting only the distinct ones).

The product of its (nonzero) digits is 345600, while the sum is 42.

The square root of 660854256 is about 25707.0857158100. The cubic root of 660854256 is about 871.0342462972.

The spelling of 660854256 in words is "six hundred sixty million, eight hundred fifty-four thousand, two hundred fifty-six".