8166725239 has 4 divisors (see below), whose sum is σ = 8174647440. Its totient is φ = 8158803040.

The previous prime is 8166725233. The next prime is 8166725269. The reversal of 8166725239 is 9325276618.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 8166725239 - 2²³ = 8158336631 is a prime.

It is a super-2 number, since 2×8166725239² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 8166725192 and 8166725201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8166725233) 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, 3959554 + ... + 3961615.

It is an arithmetic number, because the mean of its divisors is an integer number (2043661860).

Almost surely, 2^8166725239 is an apocalyptic number.

8166725239 is a deficient number, since it is larger than the sum of its proper divisors (7922201).

8166725239 is a wasteful number, since it uses less digits than its factorization.

8166725239 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7922200.

The product of its digits is 1088640, while the sum is 49.

The square root of 8166725239 is about 90369.9354818847. The cubic root of 8166725239 is about 2013.7983537065.

The spelling of 8166725239 in words is "eight billion, one hundred sixty-six million, seven hundred twenty-five thousand, two hundred thirty-nine".