9665403668 has 12 divisors (see below), whose sum is σ = 16915152660. Its totient is φ = 4832502912.

The previous prime is 9665403653. The next prime is 9665403677. The reversal of 9665403668 is 8663045669.

It can be written as a sum of positive squares in 2 ways, for example, as 7698658564 + 1966745104 = 87742^2 + 44348^2 .

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, 140138 + ... + 197406.

It is an arithmetic number, because the mean of its divisors is an integer number (1409596055).

Almost surely, 2^9665403668 is an apocalyptic number.

It is an amenable number.

9665403668 is a deficient number, since it is larger than the sum of its proper divisors (7249748992).

9665403668 is a wasteful number, since it uses less digits than its factorization.

9665403668 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 99466 (or 99464 counting only the distinct ones).

The product of its (nonzero) digits is 5598720, while the sum is 53.

The square root of 9665403668 is about 98312.7848654487. The cubic root of 9665403668 is about 2130.1327305298.

The spelling of 9665403668 in words is "nine billion, six hundred sixty-five million, four hundred three thousand, six hundred sixty-eight".