7686633581 has 16 divisors (see below), whose sum is σ = 8437882560. Its totient is φ = 6944209920.

The previous prime is 7686633553. The next prime is 7686633593. The reversal of 7686633581 is 1853366867.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 7686633581 - 2¹⁰ = 7686632557 is a prime.

It is a super-2 number, since 2×7686633581² (a number of 21 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (53) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7686603581) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3351071 + ... + 3353363.

It is an arithmetic number, because the mean of its divisors is an integer number (527367660).

Almost surely, 2^7686633581 is an apocalyptic number.

It is an amenable number.

7686633581 is a deficient number, since it is larger than the sum of its proper divisors (751248979).

7686633581 is a wasteful number, since it uses less digits than its factorization.

7686633581 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4076.

The product of its digits is 4354560, while the sum is 53.

The square root of 7686633581 is about 87673.4485519989. The cubic root of 7686633581 is about 1973.5375452132.

The spelling of 7686633581 in words is "seven billion, six hundred eighty-six million, six hundred thirty-three thousand, five hundred eighty-one".