256666348 has 12 divisors (see below), whose sum is σ = 449330112. Its totient is φ = 128286320.

The previous prime is 256666331. The next prime is 256666363. The reversal of 256666348 is 843666652.

It is a happy number.

It is a super-2 number, since 2×256666348² = 131755228391314208, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 256666298 and 256666307.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2538 + ... + 22798.

It is an arithmetic number, because the mean of its divisors is an integer number (37444176).

Almost surely, 2^256666348 is an apocalyptic number.

It is an amenable number.

256666348 is a deficient number, since it is larger than the sum of its proper divisors (192663764).

256666348 is a wasteful number, since it uses less digits than its factorization.

256666348 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23432 (or 23430 counting only the distinct ones).

The product of its digits is 1244160, while the sum is 46.

The square root of 256666348 is about 16020.8098422021. The cubic root of 256666348 is about 635.5108609353.

The spelling of 256666348 in words is "two hundred fifty-six million, six hundred sixty-six thousand, three hundred forty-eight".