6401466666 has 32 divisors (see below), whose sum is σ = 16257694080. Its totient is φ = 1828990368.

The previous prime is 6401466647. The next prime is 6401466677. The reversal of 6401466666 is 6666641046.

6401466666 is a modest number, since divided by 66666 gives 64014 as remainder.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8467171 + ... + 8467926.

It is an arithmetic number, because the mean of its divisors is an integer number (508052940).

Almost surely, 2^6401466666 is an apocalyptic number.

6401466666 is an abundant number, since it is smaller than the sum of its proper divisors (9856227414).

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

6401466666 is a wasteful number, since it uses less digits than its factorization.

6401466666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16935115 (or 16935109 counting only the distinct ones).

The product of its (nonzero) digits is 746496, while the sum is 45.

The square root of 6401466666 is about 80009.1661373870. The cubic root of 6401466666 is about 1856.7773488736. Note that the first 3 decimals are identical.

The spelling of 6401466666 in words is "six billion, four hundred one million, four hundred sixty-six thousand, six hundred sixty-six".