64466340668 has 24 divisors (see below), whose sum is σ = 113748957504. Its totient is φ = 31967611200.

The previous prime is 64466340667. The next prime is 64466340683. The reversal of 64466340668 is 86604366446.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64466340667) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 144398 + ... + 387018.

It is an arithmetic number, because the mean of its divisors is an integer number (4739539896).

Almost surely, 2^64466340668 is an apocalyptic number.

It is an amenable number.

64466340668 is a deficient number, since it is larger than the sum of its proper divisors (49282616836).

64466340668 is a wasteful number, since it uses less digits than its factorization.

64466340668 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 243173 (or 243171 counting only the distinct ones).

The product of its (nonzero) digits is 11943936, while the sum is 53.

The spelling of 64466340668 in words is "sixty-four billion, four hundred sixty-six million, three hundred forty thousand, six hundred sixty-eight".