166488001 has 4 divisors (see below), whose sum is σ = 166523904. Its totient is φ = 166452100.

The previous prime is 166487989. The next prime is 166488019. The reversal of 166488001 is 100884661.

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: 100884661 = 19 ⋅5309719.

It is a cyclic number.

It is not a de Polignac number, because 166488001 - 2⁵ = 166487969 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (166488061) 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, 9745 + ... + 20686.

It is an arithmetic number, because the mean of its divisors is an integer number (41630976).

Almost surely, 2^166488001 is an apocalyptic number.

It is an amenable number.

166488001 is a deficient number, since it is larger than the sum of its proper divisors (35903).

166488001 is an equidigital number, since it uses as much as digits as its factorization.

166488001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35902.

The product of its (nonzero) digits is 9216, while the sum is 34.

The square root of 166488001 is about 12903.0229403811. The cubic root of 166488001 is about 550.1244908280.

It can be divided in two parts, 16648 and 8001, that added together give a square (24649 = 157²).

The spelling of 166488001 in words is "one hundred sixty-six million, four hundred eighty-eight thousand, one".