83646681 has 8 divisors (see below), whose sum is σ = 118089504. Its totient is φ = 52484160.

The previous prime is 83646659. The next prime is 83646697. The reversal of 83646681 is 18664638.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 83646681 - 2¹⁴ = 83630297 is a prime.

It is a super-2 number, since 2×83646681² = 13993534484631522, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (83646611) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 820015 + ... + 820116.

It is an arithmetic number, because the mean of its divisors is an integer number (14761188).

Almost surely, 2^83646681 is an apocalyptic number.

It is an amenable number.

83646681 is a deficient number, since it is larger than the sum of its proper divisors (34442823).

83646681 is a wasteful number, since it uses less digits than its factorization.

83646681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1640151.

The product of its digits is 165888, while the sum is 42.

The square root of 83646681 is about 9145.8559468209. The cubic root of 83646681 is about 437.3370164063.

The spelling of 83646681 in words is "eighty-three million, six hundred forty-six thousand, six hundred eighty-one".