680798161 has 8 divisors (see below), whose sum is σ = 704008448. Its totient is φ = 657666000.

The previous prime is 680798159. The next prime is 680798207. The reversal of 680798161 is 161897086.

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 680798161 - 2¹ = 680798159 is a prime.

It is a super-2 number, since 2×680798161² = 926972272041963842, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (680798561) 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 7 ways as a sum of consecutive naturals, for example, 1530 + ... + 36931.

It is an arithmetic number, because the mean of its divisors is an integer number (88001056).

Almost surely, 2^680798161 is an apocalyptic number.

It is an amenable number.

680798161 is a deficient number, since it is larger than the sum of its proper divisors (23210287).

680798161 is a wasteful number, since it uses less digits than its factorization.

680798161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39063.

The product of its (nonzero) digits is 145152, while the sum is 46.

The square root of 680798161 is about 26092.1091711651. The cubic root of 680798161 is about 879.7098565688.

The spelling of 680798161 in words is "six hundred eighty million, seven hundred ninety-eight thousand, one hundred sixty-one".