64478366 has 16 divisors (see below), whose sum is σ = 98703360. Its totient is φ = 31583160.

The previous prime is 64478341. The next prime is 64478377. The reversal of 64478366 is 66387446.

It is a happy number.

It is a Curzon number.

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, 22355 + ... + 25073.

It is an arithmetic number, because the mean of its divisors is an integer number (6168960).

Almost surely, 2^64478366 is an apocalyptic number.

64478366 is a deficient number, since it is larger than the sum of its proper divisors (34224994).

64478366 is a wasteful number, since it uses less digits than its factorization.

64478366 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2959.

The product of its digits is 580608, while the sum is 44.

The square root of 64478366 is about 8029.8422151372. The cubic root of 64478366 is about 400.9941230847.

The spelling of 64478366 in words is "sixty-four million, four hundred seventy-eight thousand, three hundred sixty-six".