681701976 has 24 divisors (see below), whose sum is σ = 1846276380. Its totient is φ = 227233968.

The previous prime is 681701971. The next prime is 681701983. The reversal of 681701976 is 679107186.

It is a tau number, because it is divible by the number of its divisors (24).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (681701971) 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 5 ways as a sum of consecutive naturals, for example, 4733970 + ... + 4734113.

Almost surely, 2^681701976 is an apocalyptic number.

It is an amenable number.

681701976 is an abundant number, since it is smaller than the sum of its proper divisors (1164574404).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

681701976 is a wasteful number, since it uses less digits than its factorization.

681701976 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9468095 (or 9468088 counting only the distinct ones).

The product of its (nonzero) digits is 127008, while the sum is 45.

The square root of 681701976 is about 26109.4231265266. The cubic root of 681701976 is about 880.0989799134.

The spelling of 681701976 in words is "six hundred eighty-one million, seven hundred one thousand, nine hundred seventy-six".