6666042464 has 12 divisors (see below), whose sum is σ = 13123771164. Its totient is φ = 3333021216.

The previous prime is 6666042443. The next prime is 6666042497. The reversal of 6666042464 is 4642406666.

It is a super-2 number, since 2×6666042464² = 88872244263702382592, which contains 22 as substring.

It is a Smith number, since the sum of its digits (44) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 104156882 + ... + 104156945.

It is an arithmetic number, because the mean of its divisors is an integer number (1093647597).

Almost surely, 2^6666042464 is an apocalyptic number.

It is an amenable number.

6666042464 is a deficient number, since it is larger than the sum of its proper divisors (6457728700).

6666042464 is a wasteful number, since it uses less digits than its factorization.

6666042464 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 208313837 (or 208313829 counting only the distinct ones).

The product of its (nonzero) digits is 995328, while the sum is 44.

The square root of 6666042464 is about 81645.8355582206. The cubic root of 6666042464 is about 1882.0133162088.

The spelling of 6666042464 in words is "six billion, six hundred sixty-six million, forty-two thousand, four hundred sixty-four".