677941781 has 8 divisors (see below), whose sum is σ = 744895200. Its totient is φ = 611875440.

The previous prime is 677941769. The next prime is 677941783. The reversal of 677941781 is 187149776.

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

It is not a de Polignac number, because 677941781 - 2²⁶ = 610832917 is a prime.

It is a super-2 number, since 2×677941781² = 919210116850903922, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (677941783) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 220166 + ... + 223223.

It is an arithmetic number, because the mean of its divisors is an integer number (93111900).

Almost surely, 2^677941781 is an apocalyptic number.

It is an amenable number.

677941781 is a deficient number, since it is larger than the sum of its proper divisors (66953419).

677941781 is a wasteful number, since it uses less digits than its factorization.

677941781 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 443539.

The product of its digits is 592704, while the sum is 50.

The square root of 677941781 is about 26037.3151649704. The cubic root of 677941781 is about 878.4778183321.

The spelling of 677941781 in words is "six hundred seventy-seven million, nine hundred forty-one thousand, seven hundred eighty-one".