6641516066 has 16 divisors (see below), whose sum is σ = 10196470944. Its totient is φ = 3242730624.

The previous prime is 6641516047. The next prime is 6641516081. The reversal of 6641516066 is 6606151466.

It is a super-2 number, since 2×6641516066² = 88219471309872232712, which contains 22 as substring.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 495890 + ... + 509106.

It is an arithmetic number, because the mean of its divisors is an integer number (637279434).

Almost surely, 2^6641516066 is an apocalyptic number.

6641516066 is a deficient number, since it is larger than the sum of its proper divisors (3554954878).

6641516066 is a wasteful number, since it uses less digits than its factorization.

6641516066 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19105.

The product of its (nonzero) digits is 155520, while the sum is 41.

The square root of 6641516066 is about 81495.4972130363. The cubic root of 6641516066 is about 1879.7023130964.

The spelling of 6641516066 in words is "six billion, six hundred forty-one million, five hundred sixteen thousand, sixty-six".