64466573818381 has 8 divisors (see below), whose sum is σ = 73677098664320. Its totient is φ = 55256302547568.

The previous prime is 64466573818357. The next prime is 64466573818489. The reversal of 64466573818381 is 18381837566446.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 64466573818381 - 2³¹ = 64464426334733 is a prime.

It is a super-2 number, since 2×64466573818381² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 64466573818381.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64466573818301) 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, 62848686 + ... + 63866191.

It is an arithmetic number, because the mean of its divisors is an integer number (9209637333040).

Almost surely, 2^{64466573818381} is an apocalyptic number.

It is an amenable number.

64466573818381 is a deficient number, since it is larger than the sum of its proper divisors (9210524845939).

64466573818381 is a wasteful number, since it uses less digits than its factorization.

64466573818381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 126787563.

The product of its digits is 557383680, while the sum is 70.

The spelling of 64466573818381 in words is "sixty-four trillion, four hundred sixty-six billion, five hundred seventy-three million, eight hundred eighteen thousand, three hundred eighty-one".