1677680817 has 8 divisors (see below), whose sum is σ = 2267550624. Its totient is φ = 1103132448.

The previous prime is 1677680777. The next prime is 1677680833. The reversal of 1677680817 is 7180867761.

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

It is not a de Polignac number, because 1677680817 - 2⁷ = 1677680689 is a prime.

It is a super-2 number, since 2×1677680817² = 5629225847459574978, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1677680817.

It is not an unprimeable number, because it can be changed into a prime (1677680857) 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, 3830103 + ... + 3830540.

It is an arithmetic number, because the mean of its divisors is an integer number (283443828).

Almost surely, 2^1677680817 is an apocalyptic number.

It is an amenable number.

1677680817 is a deficient number, since it is larger than the sum of its proper divisors (589869807).

1677680817 is an equidigital number, since it uses as much as digits as its factorization.

1677680817 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7660719.

The product of its (nonzero) digits is 790272, while the sum is 51.

The square root of 1677680817 is about 40959.5021576191. The cubic root of 1677680817 is about 1188.2371131369.

The spelling of 1677680817 in words is "one billion, six hundred seventy-seven million, six hundred eighty thousand, eight hundred seventeen".