66323714481421 has 8 divisors (see below), whose sum is σ = 68602625388288. Its totient is φ = 64053518340000.

The previous prime is 66323714481383. The next prime is 66323714481491. The reversal of 66323714481421 is 12418441732366.

It is a happy number.

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 66323714481421 - 2⁷ = 66323714481293 is a prime.

It is a super-2 number, since 2×66323714481421² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66323714481491) 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, 2178675880 + ... + 2178706321.

It is an arithmetic number, because the mean of its divisors is an integer number (8575328173536).

Almost surely, 2^{66323714481421} is an apocalyptic number.

It is an amenable number.

66323714481421 is a deficient number, since it is larger than the sum of its proper divisors (2278910906867).

66323714481421 is a wasteful number, since it uses less digits than its factorization.

66323714481421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4357382723.

The product of its digits is 4644864, while the sum is 52.

The spelling of 66323714481421 in words is "sixty-six trillion, three hundred twenty-three billion, seven hundred fourteen million, four hundred eighty-one thousand, four hundred twenty-one".