6646869542 has 32 divisors (see below), whose sum is σ = 11027016000. Its totient is φ = 2990711808.

The previous prime is 6646869527. The next prime is 6646869553. The reversal of 6646869542 is 2459686466.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 68834 + ... + 134282.

It is an arithmetic number, because the mean of its divisors is an integer number (344594250).

Almost surely, 2^6646869542 is an apocalyptic number.

6646869542 is a deficient number, since it is larger than the sum of its proper divisors (4380146458).

6646869542 is a wasteful number, since it uses less digits than its factorization.

6646869542 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65600.

The product of its digits is 14929920, while the sum is 56.

The square root of 6646869542 is about 81528.3358225838. The cubic root of 6646869542 is about 1880.2072298727.

The spelling of 6646869542 in words is "six billion, six hundred forty-six million, eight hundred sixty-nine thousand, five hundred forty-two".