676557109 has 4 divisors (see below), whose sum is σ = 716354604. Its totient is φ = 636759616.

The previous prime is 676557059. The next prime is 676557127. The reversal of 676557109 is 901755676.

It is a happy number.

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

It can be written as a sum of positive squares in 2 ways, for example, as 577056484 + 99500625 = 24022^2 + 9975^2 .

It is not a de Polignac number, because 676557109 - 2⁹ = 676556597 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (676557139) 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, 19898722 + ... + 19898755.

It is an arithmetic number, because the mean of its divisors is an integer number (179088651).

Almost surely, 2^676557109 is an apocalyptic number.

It is an amenable number.

676557109 is a deficient number, since it is larger than the sum of its proper divisors (39797495).

676557109 is a wasteful number, since it uses less digits than its factorization.

676557109 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39797494.

The product of its (nonzero) digits is 396900, while the sum is 46.

The square root of 676557109 is about 26010.7114281790. The cubic root of 676557109 is about 877.8793241022.

The spelling of 676557109 in words is "six hundred seventy-six million, five hundred fifty-seven thousand, one hundred nine".