166044601 has 4 divisors (see below), whose sum is σ = 169177572. Its totient is φ = 162911632.

The previous prime is 166044581. The next prime is 166044611. The reversal of 166044601 is 106440661.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 106440661 = 59 ⋅1804079.

It can be written as a sum of positive squares in 2 ways, for example, as 146991376 + 19053225 = 12124^2 + 4365^2 .

It is a cyclic number.

It is not a de Polignac number, because 166044601 - 2⁵ = 166044569 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 166044601.

It is not an unprimeable number, because it can be changed into a prime (166044611) 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, 1566406 + ... + 1566511.

It is an arithmetic number, because the mean of its divisors is an integer number (42294393).

Almost surely, 2^166044601 is an apocalyptic number.

It is an amenable number.

166044601 is a deficient number, since it is larger than the sum of its proper divisors (3132971).

166044601 is an equidigital number, since it uses as much as digits as its factorization.

166044601 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3132970.

The product of its (nonzero) digits is 3456, while the sum is 28.

The square root of 166044601 is about 12885.8294649588. The cubic root of 166044601 is about 549.6356826982.

The spelling of 166044601 in words is "one hundred sixty-six million, forty-four thousand, six hundred one".