681008077 has 8 divisors (see below), whose sum is σ = 694383840. Its totient is φ = 667651920.

The previous prime is 681008063. The next prime is 681008113. The reversal of 681008077 is 770800186.

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 681008077 - 2²³ = 672619469 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (681008057) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 79174 + ... + 87352.

It is an arithmetic number, because the mean of its divisors is an integer number (86797980).

Almost surely, 2^681008077 is an apocalyptic number.

It is an amenable number.

681008077 is a deficient number, since it is larger than the sum of its proper divisors (13375763).

681008077 is a wasteful number, since it uses less digits than its factorization.

681008077 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9803.

The product of its (nonzero) digits is 18816, while the sum is 37.

The square root of 681008077 is about 26096.1314565972. The cubic root of 681008077 is about 879.8002632945.

The spelling of 681008077 in words is "six hundred eighty-one million, eight thousand, seventy-seven".