677606705 has 4 divisors (see below), whose sum is σ = 813128052. Its totient is φ = 542085360.

The previous prime is 677606701. The next prime is 677606707. The reversal of 677606705 is 507606776.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 309619216 + 367987489 = 17596^2 + 19183^2 .

It is not a de Polignac number, because 677606705 - 2² = 677606701 is a prime.

It is a super-3 number, since 3×677606705³ (a number of 27 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (677606701) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 67760666 + ... + 67760675.

It is an arithmetic number, because the mean of its divisors is an integer number (203282013).

Almost surely, 2^677606705 is an apocalyptic number.

It is an amenable number.

677606705 is a deficient number, since it is larger than the sum of its proper divisors (135521347).

677606705 is a wasteful number, since it uses less digits than its factorization.

677606705 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 135521346.

The product of its (nonzero) digits is 370440, while the sum is 44.

The square root of 677606705 is about 26030.8798353033. The cubic root of 677606705 is about 878.3330638459. Note that the first 3 decimals are identical.

The spelling of 677606705 in words is "six hundred seventy-seven million, six hundred six thousand, seven hundred five".