166480639 has 4 divisors (see below), whose sum is σ = 179286856. Its totient is φ = 153674424.

The previous prime is 166480637. The next prime is 166480663. The reversal of 166480639 is 936084661.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 936084661 = 71 ⋅13184291.

It is a cyclic number.

It is not a de Polignac number, because 166480639 - 2¹ = 166480637 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 166480595 and 166480604.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166480637) 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, 6403089 + ... + 6403114.

It is an arithmetic number, because the mean of its divisors is an integer number (44821714).

Almost surely, 2^166480639 is an apocalyptic number.

166480639 is a deficient number, since it is larger than the sum of its proper divisors (12806217).

166480639 is a wasteful number, since it uses less digits than its factorization.

166480639 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12806216.

The product of its (nonzero) digits is 186624, while the sum is 43.

The square root of 166480639 is about 12902.7376552420. The cubic root of 166480639 is about 550.1163819830.

The spelling of 166480639 in words is "one hundred sixty-six million, four hundred eighty thousand, six hundred thirty-nine".