257417066 has 16 divisors (see below), whose sum is σ = 398170080. Its totient is φ = 124722000.

The previous prime is 257417063. The next prime is 257417071. The reversal of 257417066 is 660714752.

It is not an unprimeable number, because it can be changed into a prime (257417063) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11645 + ... + 25503.

It is an arithmetic number, because the mean of its divisors is an integer number (24885630).

Almost surely, 2^257417066 is an apocalyptic number.

257417066 is a deficient number, since it is larger than the sum of its proper divisors (140753014).

257417066 is a wasteful number, since it uses less digits than its factorization.

257417066 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14149.

The product of its (nonzero) digits is 70560, while the sum is 38.

The square root of 257417066 is about 16044.2221999074. Note that the first 3 decimals coincide. The cubic root of 257417066 is about 636.1298552803.

The spelling of 257417066 in words is "two hundred fifty-seven million, four hundred seventeen thousand, sixty-six".