677780069 has 4 divisors (see below), whose sum is σ = 680480640. Its totient is φ = 675079500.

The previous prime is 677780057. The next prime is 677780071. The reversal of 677780069 is 960087776.

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 677780069 - 2⁸ = 677779813 is a prime.

It is a super-2 number, since 2×677780069² = 918771643867289522, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 677779999 and 677780026.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (677780029) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1349909 + ... + 1350410.

It is an arithmetic number, because the mean of its divisors is an integer number (170120160).

Almost surely, 2^677780069 is an apocalyptic number.

It is an amenable number.

677780069 is a deficient number, since it is larger than the sum of its proper divisors (2700571).

677780069 is a wasteful number, since it uses less digits than its factorization.

677780069 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2700570.

The product of its (nonzero) digits is 889056, while the sum is 50.

The square root of 677780069 is about 26034.2095904600. The cubic root of 677780069 is about 878.4079639062.

The spelling of 677780069 in words is "six hundred seventy-seven million, seven hundred eighty thousand, sixty-nine".