65681008 has 20 divisors (see below), whose sum is σ = 132790608. Its totient is φ = 31412480.

The previous prime is 65681003. The next prime is 65681009. The reversal of 65681008 is 80018656.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65681003) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 88873 + ... + 89608.

Almost surely, 2^65681008 is an apocalyptic number.

It is an amenable number.

65681008 is an abundant number, since it is smaller than the sum of its proper divisors (67109600).

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

65681008 is a wasteful number, since it uses less digits than its factorization.

65681008 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 178512 (or 178506 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 34.

The square root of 65681008 is about 8104.3820245593. The cubic root of 65681008 is about 403.4718779713.

The spelling of 65681008 in words is "sixty-five million, six hundred eighty-one thousand, eight".