166201263 has 12 divisors (see below), whose sum is σ = 240255288. Its totient is φ = 110714640.

The previous prime is 166201247. The next prime is 166201279. The reversal of 166201263 is 362102661.

166201263 is a `hidden beast` number, since 16 + 620 + 1 + 26 + 3 = 666.

It is an interprime number because it is at equal distance from previous prime (166201247) and next prime (166201279).

It is not a de Polignac number, because 166201263 - 2⁴ = 166201247 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166201223) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6373 + ... + 19313.

It is an arithmetic number, because the mean of its divisors is an integer number (20021274).

Almost surely, 2^166201263 is an apocalyptic number.

166201263 is a deficient number, since it is larger than the sum of its proper divisors (74054025).

166201263 is a wasteful number, since it uses less digits than its factorization.

166201263 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14374 (or 14371 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 27.

The square root of 166201263 is about 12891.9068798995. The cubic root of 166201263 is about 549.8084875923.

It can be divided in two parts, 166201 and 263, that added together give a square (166464 = 408²).

The spelling of 166201263 in words is "one hundred sixty-six million, two hundred one thousand, two hundred sixty-three".