677447837421 has 4 divisors (see below), whose sum is σ = 903263783232. Its totient is φ = 451631891612.

The previous prime is 677447837401. The next prime is 677447837509. The reversal of 677447837421 is 124738744776.

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 677447837421 - 2²³ = 677439448813 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (677447837401) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 112907972901 + ... + 112907972906.

It is an arithmetic number, because the mean of its divisors is an integer number (225815945808).

Almost surely, 2^677447837421 is an apocalyptic number.

It is an amenable number.

677447837421 is a deficient number, since it is larger than the sum of its proper divisors (225815945811).

677447837421 is a wasteful number, since it uses less digits than its factorization.

677447837421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 225815945810.

The product of its digits is 44255232, while the sum is 60.

The spelling of 677447837421 in words is "six hundred seventy-seven billion, four hundred forty-seven million, eight hundred thirty-seven thousand, four hundred twenty-one".