166071001 has 4 divisors (see below), whose sum is σ = 174811600. Its totient is φ = 157330404.

The previous prime is 166070959. The next prime is 166071007. The reversal of 166071001 is 100170661.

166071001 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 100170661 = 233 ⋅429917.

It is a cyclic number.

It is not a de Polignac number, because 166071001 - 2¹⁷ = 165939929 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (166071007) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4370271 + ... + 4370308.

It is an arithmetic number, because the mean of its divisors is an integer number (43702900).

Almost surely, 2^166071001 is an apocalyptic number.

It is an amenable number.

166071001 is a deficient number, since it is larger than the sum of its proper divisors (8740599).

166071001 is an equidigital number, since it uses as much as digits as its factorization.

166071001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8740598.

The product of its (nonzero) digits is 252, while the sum is 22.

The square root of 166071001 is about 12886.8538053320. The cubic root of 166071001 is about 549.6648106413.

The spelling of 166071001 in words is "one hundred sixty-six million, seventy-one thousand, one".