166023307 has 4 divisors (see below), whose sum is σ = 166557456. Its totient is φ = 165489160.

The previous prime is 166023287. The next prime is 166023337. The reversal of 166023307 is 703320661.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 703320661 = 4007 ⋅175523.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-166023307 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (166023337) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 266608 + ... + 267229.

It is an arithmetic number, because the mean of its divisors is an integer number (41639364).

Almost surely, 2^166023307 is an apocalyptic number.

166023307 is a deficient number, since it is larger than the sum of its proper divisors (534149).

166023307 is an equidigital number, since it uses as much as digits as its factorization.

166023307 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 534148.

The product of its (nonzero) digits is 4536, while the sum is 28.

The square root of 166023307 is about 12885.0031819942. The cubic root of 166023307 is about 549.6121861146.

Adding to 166023307 its reverse (703320661), we get a palindrome (869343968).

The spelling of 166023307 in words is "one hundred sixty-six million, twenty-three thousand, three hundred seven".