166442723 has 8 divisors (see below), whose sum is σ = 171365568. Its totient is φ = 161567784.

The previous prime is 166442719. The next prime is 166442729. The reversal of 166442723 is 327244661.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 166442723 - 2² = 166442719 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (166442729) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4865 + ... + 18882.

It is an arithmetic number, because the mean of its divisors is an integer number (21420696).

Almost surely, 2^166442723 is an apocalyptic number.

166442723 is a deficient number, since it is larger than the sum of its proper divisors (4922845).

166442723 is a wasteful number, since it uses less digits than its factorization.

166442723 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23953.

The product of its digits is 48384, while the sum is 35.

The square root of 166442723 is about 12901.2682709879. The cubic root of 166442723 is about 550.0746157721.

The spelling of 166442723 in words is "one hundred sixty-six million, four hundred forty-two thousand, seven hundred twenty-three".