166038261 has 8 divisors (see below), whose sum is σ = 224688864. Its totient is φ = 109039920.

The previous prime is 166038259. The next prime is 166038287. The reversal of 166038261 is 162830661.

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

It is not a de Polignac number, because 166038261 - 2¹ = 166038259 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166038211) 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, 412830 + ... + 413231.

It is an arithmetic number, because the mean of its divisors is an integer number (28086108).

Almost surely, 2^166038261 is an apocalyptic number.

It is an amenable number.

166038261 is a deficient number, since it is larger than the sum of its proper divisors (58650603).

166038261 is an equidigital number, since it uses as much as digits as its factorization.

166038261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 826131.

The product of its (nonzero) digits is 10368, while the sum is 33.

The square root of 166038261 is about 12885.5834559402. The cubic root of 166038261 is about 549.6286871188.

The spelling of 166038261 in words is "one hundred sixty-six million, thirty-eight thousand, two hundred sixty-one".