166353261 has 8 divisors (see below), whose sum is σ = 221901504. Its totient is φ = 110853600.

The previous prime is 166353241. The next prime is 166353269. The reversal of 166353261 is 162353661.

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

It is not a de Polignac number, because 166353261 - 2¹⁰ = 166352237 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166353269) 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, 3216 + ... + 18521.

It is an arithmetic number, because the mean of its divisors is an integer number (27737688).

Almost surely, 2^166353261 is an apocalyptic number.

It is an amenable number.

166353261 is a deficient number, since it is larger than the sum of its proper divisors (55548243).

166353261 is a wasteful number, since it uses less digits than its factorization.

166353261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24291.

The product of its digits is 19440, while the sum is 33.

The square root of 166353261 is about 12897.8006264634. The cubic root of 166353261 is about 549.9760441357.

The spelling of 166353261 in words is "one hundred sixty-six million, three hundred fifty-three thousand, two hundred sixty-one".