256712066 has 16 divisors (see below), whose sum is σ = 417178944. Its totient is φ = 117771024.

The previous prime is 256712063. The next prime is 256712069. The reversal of 256712066 is 660217652.

256712066 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 (256712063) and next prime (256712069).

It is not an unprimeable number, because it can be changed into a prime (256712063) 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, 25220 + ... + 33903.

It is an arithmetic number, because the mean of its divisors is an integer number (26073684).

Almost surely, 2^256712066 is an apocalyptic number.

256712066 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

256712066 is a deficient number, since it is larger than the sum of its proper divisors (160466878).

256712066 is a wasteful number, since it uses less digits than its factorization.

256712066 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 59305.

The product of its (nonzero) digits is 30240, while the sum is 35.

The square root of 256712066 is about 16022.2366104112. The cubic root of 256712066 is about 635.5485915804.

The spelling of 256712066 in words is "two hundred fifty-six million, seven hundred twelve thousand, sixty-six".