677655691 has 8 divisors (see below), whose sum is σ = 736332800. Its totient is φ = 621279720.

The previous prime is 677655679. The next prime is 677655733. The reversal of 677655691 is 196556776.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 677655691 - 2⁵ = 677655659 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (677655611) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 574671 + ... + 575848.

It is an arithmetic number, because the mean of its divisors is an integer number (92041600).

Almost surely, 2^677655691 is an apocalyptic number.

677655691 is a deficient number, since it is larger than the sum of its proper divisors (58677109).

677655691 is a wasteful number, since it uses less digits than its factorization.

677655691 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1150569.

The product of its digits is 2381400, while the sum is 52.

The square root of 677655691 is about 26031.8207392414. The cubic root of 677655691 is about 878.3542290176.

The spelling of 677655691 in words is "six hundred seventy-seven million, six hundred fifty-five thousand, six hundred ninety-one".