257506606 has 16 divisors (see below), whose sum is σ = 453371616. Its totient is φ = 107377056.

The previous prime is 257506589. The next prime is 257506619. The reversal of 257506606 is 606605752.

It is a Harshad number since it is a multiple of its sum of digits (37).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 248041 + ... + 249076.

It is an arithmetic number, because the mean of its divisors is an integer number (28335726).

Almost surely, 2^257506606 is an apocalyptic number.

257506606 is a deficient number, since it is larger than the sum of its proper divisors (195865010).

257506606 is a wasteful number, since it uses less digits than its factorization.

257506606 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 497163.

The product of its (nonzero) digits is 75600, while the sum is 37.

The square root of 257506606 is about 16047.0123699086. The cubic root of 257506606 is about 636.2036039057.

The spelling of 257506606 in words is "two hundred fifty-seven million, five hundred six thousand, six hundred six".