677676720085 has 8 divisors (see below), whose sum is σ = 813880281816. Its totient is φ = 541695897600.

The previous prime is 677676720079. The next prime is 677676720101. The reversal of 677676720085 is 580027676776.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 93366302481 + 584310417604 = 305559^2 + 764402^2 .

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

It is not a de Polignac number, because 677676720085 - 2⁵ = 677676720053 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 55678116 + ... + 55690285.

It is an arithmetic number, because the mean of its divisors is an integer number (101735035227).

Almost surely, 2^677676720085 is an apocalyptic number.

It is an amenable number.

677676720085 is a deficient number, since it is larger than the sum of its proper divisors (136203561731).

677676720085 is a wasteful number, since it uses less digits than its factorization.

677676720085 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 111369623.

The product of its (nonzero) digits is 41489280, while the sum is 61.

The spelling of 677676720085 in words is "six hundred seventy-seven billion, six hundred seventy-six million, seven hundred twenty thousand, eighty-five".