256948066 has 8 divisors (see below), whose sum is σ = 394822764. Its totient is φ = 125340480.

The previous prime is 256948061. The next prime is 256948079. The reversal of 256948066 is 660849652.

It can be written as a sum of positive squares in 2 ways, for example, as 256672441 + 275625 = 16021^2 + 525^2 .

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

It is a super-2 number, since 2×256948066² = 132044617242280712, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (256948061) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1566675 + ... + 1566838.

Almost surely, 2^256948066 is an apocalyptic number.

256948066 is a deficient number, since it is larger than the sum of its proper divisors (137874698).

256948066 is a wasteful number, since it uses less digits than its factorization.

256948066 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3133556.

The product of its (nonzero) digits is 622080, while the sum is 46.

The square root of 256948066 is about 16029.5996830863. The cubic root of 256948066 is about 635.7432889972.

The spelling of 256948066 in words is "two hundred fifty-six million, nine hundred forty-eight thousand, sixty-six".