66431021355302 has 8 divisors (see below), whose sum is σ = 99655160220000. Its totient is φ = 33212634615304.

The previous prime is 66431021355287. The next prime is 66431021355319. The reversal of 66431021355302 is 20355312013466.

66431021355302 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a super-2 number, since 2×66431021355302² (a number of 28 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 66431021355302.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1438002302 + ... + 1438048497.

It is an arithmetic number, because the mean of its divisors is an integer number (12456895027500).

Almost surely, 2^{66431021355302} is an apocalyptic number.

66431021355302 is a deficient number, since it is larger than the sum of its proper divisors (33224138864698).

66431021355302 is a wasteful number, since it uses less digits than its factorization.

66431021355302 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2876062350.

The product of its (nonzero) digits is 388800, while the sum is 41.

Adding to 66431021355302 its reverse (20355312013466), we get a palindrome (86786333368768).

The spelling of 66431021355302 in words is "sixty-six trillion, four hundred thirty-one billion, twenty-one million, three hundred fifty-five thousand, three hundred two".