166189001 has 4 divisors (see below), whose sum is σ = 181297104. Its totient is φ = 151080900.

The previous prime is 166188989. The next prime is 166189013. The reversal of 166189001 is 100981661.

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.

It is an interprime number because it is at equal distance from previous prime (166188989) and next prime (166189013).

It is a cyclic number.

It is not a de Polignac number, because 166189001 - 2¹⁰ = 166187977 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (166189081) 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, 7554035 + ... + 7554056.

It is an arithmetic number, because the mean of its divisors is an integer number (45324276).

Almost surely, 2^166189001 is an apocalyptic number.

166189001 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

166189001 is a deficient number, since it is larger than the sum of its proper divisors (15108103).

166189001 is a wasteful number, since it uses less digits than its factorization.

166189001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15108102.

The product of its (nonzero) digits is 2592, while the sum is 32.

The square root of 166189001 is about 12891.4313014498. The cubic root of 166189001 is about 549.7949659993.

The spelling of 166189001 in words is "one hundred sixty-six million, one hundred eighty-nine thousand, one".