256078660 has 12 divisors (see below), whose sum is σ = 537765228. Its totient is φ = 102431456.

The previous prime is 256078657. The next prime is 256078663. The reversal of 256078660 is 66870652.

256078660 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (256078657) and next prime (256078663).

It can be written as a sum of positive squares in 2 ways, for example, as 202379076 + 53699584 = 14226^2 + 7328^2 .

It is not an unprimeable number, because it can be changed into a prime (256078663) 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, 6401947 + ... + 6401986.

It is an arithmetic number, because the mean of its divisors is an integer number (44813769).

Almost surely, 2^256078660 is an apocalyptic number.

256078660 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

256078660 is an abundant number, since it is smaller than the sum of its proper divisors (281686568).

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

256078660 is a wasteful number, since it uses less digits than its factorization.

256078660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12803942 (or 12803940 counting only the distinct ones).

The product of its (nonzero) digits is 120960, while the sum is 40.

The square root of 256078660 is about 16002.4579362047. The cubic root of 256078660 is about 635.0254479644.

The spelling of 256078660 in words is "two hundred fifty-six million, seventy-eight thousand, six hundred sixty".