7689689661 has 8 divisors (see below), whose sum is σ = 10253377440. Its totient is φ = 5126230832.

The previous prime is 7689689639. The next prime is 7689689701. The reversal of 7689689661 is 1669869867.

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

It is a cyclic number.

It is not a de Polignac number, because 7689689661 - 2⁷ = 7689689533 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 7689689592 and 7689689601.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7689689261) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 49651 + ... + 133583.

It is an arithmetic number, because the mean of its divisors is an integer number (1281672180).

Almost surely, 2^7689689661 is an apocalyptic number.

It is an amenable number.

7689689661 is a deficient number, since it is larger than the sum of its proper divisors (2563687779).

7689689661 is a wasteful number, since it uses less digits than its factorization.

7689689661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 114475.

The product of its digits is 47029248, while the sum is 66.

The square root of 7689689661 is about 87690.8755857757. The cubic root of 7689689661 is about 1973.7990593260.

The spelling of 7689689661 in words is "seven billion, six hundred eighty-nine million, six hundred eighty-nine thousand, six hundred sixty-one".