6641878604 has 12 divisors (see below), whose sum is σ = 11627876064. Its totient is φ = 3319628304.

The previous prime is 6641878603. The next prime is 6641878643. The reversal of 6641878604 is 4068781466.

It is a super-2 number, since 2×6641878604² = 88229102780545977632, which contains 22 as substring.

It is a hoax number, since the sum of its digits (50) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (6641878603) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 316307 + ... + 336650.

It is an arithmetic number, because the mean of its divisors is an integer number (968989672).

Almost surely, 2^6641878604 is an apocalyptic number.

It is an amenable number.

6641878604 is a deficient number, since it is larger than the sum of its proper divisors (4985997460).

6641878604 is a wasteful number, since it uses less digits than its factorization.

6641878604 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 655504 (or 655502 counting only the distinct ones).

The product of its (nonzero) digits is 1548288, while the sum is 50.

The square root of 6641878604 is about 81497.7214650815. The cubic root of 6641878604 is about 1879.7365146809.

The spelling of 6641878604 in words is "six billion, six hundred forty-one million, eight hundred seventy-eight thousand, six hundred four".