9665439478 has 16 divisors (see below), whose sum is σ = 14951813184. Its totient is φ = 4682586240.

The previous prime is 9665439467. The next prime is 9665439491. The reversal of 9665439478 is 8749345669.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 253150 + ... + 288817.

It is an arithmetic number, because the mean of its divisors is an integer number (934488324).

Almost surely, 2^9665439478 is an apocalyptic number.

9665439478 is a deficient number, since it is larger than the sum of its proper divisors (5286373706).

9665439478 is a wasteful number, since it uses less digits than its factorization.

9665439478 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 542247.

The product of its digits is 39191040, while the sum is 61.

The square root of 9665439478 is about 98312.9669880835. The cubic root of 9665439478 is about 2130.1353612170.

The spelling of 9665439478 in words is "nine billion, six hundred sixty-five million, four hundred thirty-nine thousand, four hundred seventy-eight".