257661703 has 8 divisors (see below), whose sum is σ = 278019728. Its totient is φ = 237380544.

The previous prime is 257661667. The next prime is 257661731. The reversal of 257661703 is 307166752.

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 257661703 - 2¹⁷ = 257530631 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (257661763) by changing a digit.

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, 12150 + ... + 25747.

It is an arithmetic number, because the mean of its divisors is an integer number (34752466).

Almost surely, 2^257661703 is an apocalyptic number.

257661703 is a deficient number, since it is larger than the sum of its proper divisors (20358025).

257661703 is a wasteful number, since it uses less digits than its factorization.

257661703 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38433.

The product of its (nonzero) digits is 52920, while the sum is 37.

The square root of 257661703 is about 16051.8442242628. The cubic root of 257661703 is about 636.3313073824.

The spelling of 257661703 in words is "two hundred fifty-seven million, six hundred sixty-one thousand, seven hundred three".