256770705 has 8 divisors (see below), whose sum is σ = 410833152. Its totient is φ = 136944368.

The previous prime is 256770697. The next prime is 256770721. The reversal of 256770705 is 507077652.

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 256770705 - 2³ = 256770697 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8559009 + ... + 8559038.

It is an arithmetic number, because the mean of its divisors is an integer number (51354144).

Almost surely, 2^256770705 is an apocalyptic number.

It is an amenable number.

256770705 is a deficient number, since it is larger than the sum of its proper divisors (154062447).

256770705 is a wasteful number, since it uses less digits than its factorization.

256770705 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17118055.

The product of its (nonzero) digits is 102900, while the sum is 39.

The square root of 256770705 is about 16024.0664314649. The cubic root of 256770705 is about 635.5969792509.

The spelling of 256770705 in words is "two hundred fifty-six million, seven hundred seventy thousand, seven hundred five".