257666034 has 16 divisors (see below), whose sum is σ = 516241440. Its totient is φ = 85737120.

The previous prime is 257666009. The next prime is 257666051. The reversal of 257666034 is 430666752.

It is a junction number, because it is equal to n+sod(n) for n = 257665983 and 257666001.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 34179 + ... + 41030.

It is an arithmetic number, because the mean of its divisors is an integer number (32265090).

Almost surely, 2^257666034 is an apocalyptic number.

257666034 is an abundant number, since it is smaller than the sum of its proper divisors (258575406).

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

257666034 is a wasteful number, since it uses less digits than its factorization.

257666034 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 75785.

The product of its (nonzero) digits is 181440, while the sum is 39.

The square root of 257666034 is about 16051.9791303129. The cubic root of 257666034 is about 636.3348726974.

The spelling of 257666034 in words is "two hundred fifty-seven million, six hundred sixty-six thousand, thirty-four".