166281801 has 16 divisors (see below), whose sum is σ = 253824000. Its totient is φ = 94852368.

The previous prime is 166281793. The next prime is 166281803. The reversal of 166281801 is 108182661.

It is not a de Polignac number, because 166281801 - 2³ = 166281793 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (166281803) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5970 + ... + 19188.

It is an arithmetic number, because the mean of its divisors is an integer number (15864000).

Almost surely, 2^166281801 is an apocalyptic number.

It is an amenable number.

166281801 is a deficient number, since it is larger than the sum of its proper divisors (87542199).

166281801 is a wasteful number, since it uses less digits than its factorization.

166281801 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13828.

The product of its (nonzero) digits is 4608, while the sum is 33.

The square root of 166281801 is about 12895.0300891467. The cubic root of 166281801 is about 549.8972821951.

The spelling of 166281801 in words is "one hundred sixty-six million, two hundred eighty-one thousand, eight hundred one".