681685332 has 12 divisors (see below), whose sum is σ = 1590599136. Its totient is φ = 227228440.

The previous prime is 681685283. The next prime is 681685343. The reversal of 681685332 is 233586186.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 28403544 + ... + 28403567.

It is an arithmetic number, because the mean of its divisors is an integer number (132549928).

Almost surely, 2^681685332 is an apocalyptic number.

It is an amenable number.

681685332 is an abundant number, since it is smaller than the sum of its proper divisors (908913804).

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

681685332 is a wasteful number, since it uses less digits than its factorization.

681685332 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56807118 (or 56807116 counting only the distinct ones).

The product of its digits is 207360, while the sum is 42.

The square root of 681685332 is about 26109.1043890824. The cubic root of 681685332 is about 880.0918172103.

The spelling of 681685332 in words is "six hundred eighty-one million, six hundred eighty-five thousand, three hundred thirty-two".