677068781 has 4 divisors (see below), whose sum is σ = 712704000. Its totient is φ = 641433564.

The previous prime is 677068759. The next prime is 677068783. The reversal of 677068781 is 187860776.

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 677068781 - 2¹⁰ = 677067757 is a prime.

It is a super-2 number, since 2×677068781² = 916844268409651922, 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 (677068783) 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, 17817581 + ... + 17817618.

It is an arithmetic number, because the mean of its divisors is an integer number (178176000).

Almost surely, 2^677068781 is an apocalyptic number.

It is an amenable number.

677068781 is a deficient number, since it is larger than the sum of its proper divisors (35635219).

677068781 is a wasteful number, since it uses less digits than its factorization.

677068781 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35635218.

The product of its (nonzero) digits is 790272, while the sum is 50.

The square root of 677068781 is about 26020.5453632317. The cubic root of 677068781 is about 878.1005781905.

The spelling of 677068781 in words is "six hundred seventy-seven million, sixty-eight thousand, seven hundred eighty-one".