677976203521 has 4 divisors (see below), whose sum is σ = 681525817344. Its totient is φ = 674426589700.

The previous prime is 677976203477. The next prime is 677976203537. The reversal of 677976203521 is 125302679776.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 677976203521 - 2¹³ = 677976195329 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (677976203561) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1774806625 + ... + 1774807006.

It is an arithmetic number, because the mean of its divisors is an integer number (170381454336).

Almost surely, 2^677976203521 is an apocalyptic number.

It is an amenable number.

677976203521 is a deficient number, since it is larger than the sum of its proper divisors (3549613823).

677976203521 is a wasteful number, since it uses less digits than its factorization.

677976203521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3549613822.

The product of its (nonzero) digits is 6667920, while the sum is 55.

The spelling of 677976203521 in words is "six hundred seventy-seven billion, nine hundred seventy-six million, two hundred three thousand, five hundred twenty-one".