9664478 has 4 divisors (see below), whose sum is σ = 14496720. Its totient is φ = 4832238.

The previous prime is 9664477. The next prime is 9664519. The reversal of 9664478 is 8744669.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 8744669 = 23 ⋅380203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9664471) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2416118 + ... + 2416121.

It is an arithmetic number, because the mean of its divisors is an integer number (3624180).

Almost surely, 2^9664478 is an apocalyptic number.

9664478 is a deficient number, since it is larger than the sum of its proper divisors (4832242).

9664478 is a wasteful number, since it uses less digits than its factorization.

9664478 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4832241.

The product of its digits is 290304, while the sum is 44.

The square root of 9664478 is about 3108.7743565592. The cubic root of 9664478 is about 213.0064726519.

The spelling of 9664478 in words is "nine million, six hundred sixty-four thousand, four hundred seventy-eight".