256666341 has 8 divisors (see below), whose sum is σ = 343302624. Its totient is φ = 170570480.

The previous prime is 256666331. The next prime is 256666363. The reversal of 256666341 is 143666652.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 256666341 - 2⁵ = 256666309 is a prime.

It is a super-2 number, since 2×256666341² = 131755221204656562, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 256666341.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (256666331) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 133995 + ... + 135896.

It is an arithmetic number, because the mean of its divisors is an integer number (42912828).

Almost surely, 2^256666341 is an apocalyptic number.

It is an amenable number.

256666341 is a deficient number, since it is larger than the sum of its proper divisors (86636283).

256666341 is a wasteful number, since it uses less digits than its factorization.

256666341 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 270211.

The product of its digits is 155520, while the sum is 39.

The square root of 256666341 is about 16020.8096237362. The cubic root of 256666341 is about 635.5108551579.

The spelling of 256666341 in words is "two hundred fifty-six million, six hundred sixty-six thousand, three hundred forty-one".