677841691 has 8 divisors (see below), whose sum is σ = 704169344. Its totient is φ = 651792960.

The previous prime is 677841673. The next prime is 677841733. The reversal of 677841691 is 196148776.

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 677841691 - 2²¹ = 675744539 is a prime.

It is a super-4 number, since 4×677841691⁴ (a number of 36 digits) contains 4444 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (677841601) 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, 64770 + ... + 74503.

It is an arithmetic number, because the mean of its divisors is an integer number (88021168).

Almost surely, 2^677841691 is an apocalyptic number.

677841691 is a deficient number, since it is larger than the sum of its proper divisors (26327653).

677841691 is a wasteful number, since it uses less digits than its factorization.

677841691 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 139461.

The product of its digits is 508032, while the sum is 49.

The square root of 677841691 is about 26035.3930448534. The cubic root of 677841691 is about 878.4345839548.

The spelling of 677841691 in words is "six hundred seventy-seven million, eight hundred forty-one thousand, six hundred ninety-one".