6666666664 has 32 divisors (see below), whose sum is σ = 14292000000. Its totient is φ = 2855885760.

The previous prime is 6666666661. The next prime is 6666666757. The reversal of 6666666664 is 4666666666.

It is a super-4 number, since 4×6666666664⁴ (a number of 40 digits) contains 4444 as substring.

It is a nialpdrome in base 10.

It is a junction number, because it is equal to n+sod(n) for n = 6666666599 and 6666666608.

It is not an unprimeable number, because it can be changed into a prime (6666666661) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 108337 + ... + 158335.

It is an arithmetic number, because the mean of its divisors is an integer number (446625000).

Almost surely, 2^6666666664 is an apocalyptic number.

It is an amenable number.

6666666664 is an abundant number, since it is smaller than the sum of its proper divisors (7625333336).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

6666666664 is a wasteful number, since it uses less digits than its factorization.

6666666664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52393 (or 52389 counting only the distinct ones).

The product of its digits is 40310784, while the sum is 58.

The square root of 6666666664 is about 81649.6580764427. The cubic root of 6666666664 is about 1882.0720575111.

It can be divided in two parts, 66666666 and 64, that multiplied together give a palindrome (4266666624).

The spelling of 6666666664 in words is "six billion, six hundred sixty-six million, six hundred sixty-six thousand, six hundred sixty-four".