6651932378 has 48 divisors (see below), whose sum is σ = 12553992360. Its totient is φ = 2620122624.

The previous prime is 6651932377. The next prime is 6651932381. The reversal of 6651932378 is 8732391566.

It can be written as a sum of positive squares in 4 ways, for example, as 3785079529 + 2866852849 = 61523^2 + 53543^2 .

It is a super-2 number, since 2×6651932378² = 88496408722969469768, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (6651932377) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 285638 + ... + 308046.

Almost surely, 2^6651932378 is an apocalyptic number.

6651932378 is a deficient number, since it is larger than the sum of its proper divisors (5902059982).

6651932378 is a wasteful number, since it uses less digits than its factorization.

6651932378 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22671 (or 22664 counting only the distinct ones).

The product of its digits is 1632960, while the sum is 50.

The square root of 6651932378 is about 81559.3794606114. The cubic root of 6651932378 is about 1880.6844853653.

The spelling of 6651932378 in words is "six billion, six hundred fifty-one million, nine hundred thirty-two thousand, three hundred seventy-eight".