257065066 has 8 divisors (see below), whose sum is σ = 402362784. Its totient is φ = 122944140.

The previous prime is 257065057. The next prime is 257065073. The reversal of 257065066 is 660560752.

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2794140 + ... + 2794231.

It is an arithmetic number, because the mean of its divisors is an integer number (50295348).

Almost surely, 2^257065066 is an apocalyptic number.

257065066 is a deficient number, since it is larger than the sum of its proper divisors (145297718).

257065066 is a wasteful number, since it uses less digits than its factorization.

257065066 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5588396.

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

The square root of 257065066 is about 16033.2487662357. The cubic root of 257065066 is about 635.8397685168.

The spelling of 257065066 in words is "two hundred fifty-seven million, sixty-five thousand, sixty-six".