6442066642 has 16 divisors (see below), whose sum is σ = 10999893312. Its totient is φ = 2800898320.

The previous prime is 6442066639. The next prime is 6442066651. The reversal of 6442066642 is 2466602446.

It is a junction number, because it is equal to n+sod(n) for n = 6442066595 and 6442066604.

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, 6365173 + ... + 6366184.

It is an arithmetic number, because the mean of its divisors is an integer number (687493332).

Almost surely, 2^6442066642 is an apocalyptic number.

6442066642 is a deficient number, since it is larger than the sum of its proper divisors (4557826670).

6442066642 is a wasteful number, since it uses less digits than its factorization.

6442066642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12731393.

The product of its (nonzero) digits is 331776, while the sum is 40.

The square root of 6442066642 is about 80262.4858947192. The cubic root of 6442066642 is about 1860.6944878364.

The spelling of 6442066642 in words is "six billion, four hundred forty-two million, sixty-six thousand, six hundred forty-two".