6466666645 has 32 divisors (see below), whose sum is σ = 8119480320. Its totient is φ = 4938071040.

The previous prime is 6466666631. The next prime is 6466666667. The reversal of 6466666645 is 5466666646.

It is not a de Polignac number, because 6466666645 - 2¹⁹ = 6466142357 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 7973290 + ... + 7974100.

It is an arithmetic number, because the mean of its divisors is an integer number (253733760).

Almost surely, 2^6466666645 is an apocalyptic number.

It is an amenable number.

6466666645 is a deficient number, since it is larger than the sum of its proper divisors (1652813675).

6466666645 is a wasteful number, since it uses less digits than its factorization.

6466666645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1405.

The product of its digits is 22394880, while the sum is 55.

The square root of 6466666645 is about 80415.5870773820. The cubic root of 6466666645 is about 1863.0599269622.

Subtracting from 6466666645 its reverse (5466666646), we obtain a palindrome (999999999).

The spelling of 6466666645 in words is "six billion, four hundred sixty-six million, six hundred sixty-six thousand, six hundred forty-five".