6480657220066 has 8 divisors (see below), whose sum is σ = 9904400657244. Its totient is φ = 3179190334320.

The previous prime is 6480657220031. The next prime is 6480657220069. The reversal of 6480657220066 is 6600227560846.

It can be written as a sum of positive squares in 2 ways, for example, as 6401805772041 + 78851448025 = 2530179^2 + 280805^2 .

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

It is a junction number, because it is equal to n+sod(n) for n = 6480657219995 and 6480657220022.

It is not an unprimeable number, because it can be changed into a prime (6480657220069) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 30569137725 + ... + 30569137936.

Almost surely, 2^{6480657220066} is an apocalyptic number.

6480657220066 is a deficient number, since it is larger than the sum of its proper divisors (3423743437178).

6480657220066 is a wasteful number, since it uses less digits than its factorization.

6480657220066 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61138275716.

The product of its (nonzero) digits is 5806080, while the sum is 52.

The spelling of 6480657220066 in words is "six trillion, four hundred eighty billion, six hundred fifty-seven million, two hundred twenty thousand, sixty-six".