257066161 has 8 divisors (see below), whose sum is σ = 282645504. Its totient is φ = 231855120.

The previous prime is 257066113. The next prime is 257066177. The reversal of 257066161 is 161660752.

It is a happy number.

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 257066161 - 2¹⁵ = 257033393 is a prime.

It is a super-2 number, since 2×257066161² = 132166022262555842, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (257069161) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 90610 + ... + 93403.

It is an arithmetic number, because the mean of its divisors is an integer number (35330688).

Almost surely, 2^257066161 is an apocalyptic number.

It is an amenable number.

257066161 is a deficient number, since it is larger than the sum of its proper divisors (25579343).

257066161 is a wasteful number, since it uses less digits than its factorization.

257066161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 184151.

The product of its (nonzero) digits is 15120, while the sum is 34.

The square root of 257066161 is about 16033.2829139886. The cubic root of 257066161 is about 635.8406713278.

The spelling of 257066161 in words is "two hundred fifty-seven million, sixty-six thousand, one hundred sixty-one".