66040705464 has 16 divisors (see below), whose sum is σ = 165101763720. Its totient is φ = 22013568480.

The previous prime is 66040705441. The next prime is 66040705501. The reversal of 66040705464 is 46450704066.

It is a happy number.

It is a super-2 number, since 2×66040705464² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

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 3 ways as a sum of consecutive naturals, for example, 1375848007 + ... + 1375848054.

Almost surely, 2^66040705464 is an apocalyptic number.

It is an amenable number.

66040705464 is an abundant number, since it is smaller than the sum of its proper divisors (99061058256).

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

66040705464 is a wasteful number, since it uses less digits than its factorization.

66040705464 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2751696070 (or 2751696066 counting only the distinct ones).

The product of its (nonzero) digits is 483840, while the sum is 42.

The spelling of 66040705464 in words is "sixty-six billion, forty million, seven hundred five thousand, four hundred sixty-four".