6664837478 has 16 divisors (see below), whose sum is σ = 11137528080. Its totient is φ = 2970006816.

The previous prime is 6664837453. The next prime is 6664837493. The reversal of 6664837478 is 8747384666.

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, 4418900 + ... + 4420407.

It is an arithmetic number, because the mean of its divisors is an integer number (696095505).

Almost surely, 2^6664837478 is an apocalyptic number.

6664837478 is a deficient number, since it is larger than the sum of its proper divisors (4472690602).

6664837478 is a wasteful number, since it uses less digits than its factorization.

6664837478 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8839351.

The product of its digits is 32514048, while the sum is 59.

The square root of 6664837478 is about 81638.4558771171. The cubic root of 6664837478 is about 1881.8999087726.

The spelling of 6664837478 in words is "six billion, six hundred sixty-four million, eight hundred thirty-seven thousand, four hundred seventy-eight".