257666704 has 15 divisors (see below), whose sum is σ = 499353673. Its totient is φ = 128801248.

The previous prime is 257666701. The next prime is 257666729. The reversal of 257666704 is 407666752.

The square root of 257666704 is 16052.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 216090000 + 41576704 = 14700^2 + 6448^2 .

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (257666701) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 62202 + ... + 66214.

Almost surely, 2^257666704 is an apocalyptic number.

257666704 is the 16052-nd square number.

It is an amenable number.

257666704 is a deficient number, since it is larger than the sum of its proper divisors (241686969).

257666704 is an frugal number, since it uses more digits than its factorization.

257666704 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8034 (or 4015 counting only the distinct ones).

The product of its (nonzero) digits is 423360, while the sum is 43.

The cubic root of 257666704 is about 636.3354242434.

The spelling of 257666704 in words is "two hundred fifty-seven million, six hundred sixty-six thousand, seven hundred four".