263250166 has 4 divisors (see below), whose sum is σ = 394875252. Its totient is φ = 131625082.

The previous prime is 263250161. The next prime is 263250193. The reversal of 263250166 is 661052362.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 661052362 = 2 ⋅330526181.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (263250161) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65812540 + ... + 65812543.

It is an arithmetic number, because the mean of its divisors is an integer number (98718813).

Almost surely, 2^263250166 is an apocalyptic number.

263250166 is a deficient number, since it is larger than the sum of its proper divisors (131625086).

263250166 is a wasteful number, since it uses less digits than its factorization.

263250166 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 131625085.

The product of its (nonzero) digits is 12960, while the sum is 31.

The square root of 263250166 is about 16224.9858551556. The cubic root of 263250166 is about 640.8989369672.

The spelling of 263250166 in words is "two hundred sixty-three million, two hundred fifty thousand, one hundred sixty-six".