66026220752660 has 96 divisors (see below), whose sum is σ = 167922568800000. Its totient is φ = 21302177043456.

The previous prime is 66026220752593. The next prime is 66026220752669. The reversal of 66026220752660 is 6625702262066.

It is a junction number, because it is equal to n+sod(n) for n = 66026220752599 and 66026220752608.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66026220752669) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 82898585 + ... + 83691264.

It is an arithmetic number, because the mean of its divisors is an integer number (1749193425000).

Almost surely, 2^{66026220752660} is an apocalyptic number.

It is an amenable number.

66026220752660 is an abundant number, since it is smaller than the sum of its proper divisors (101896348047340).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

66026220752660 is a wasteful number, since it uses less digits than its factorization.

66026220752660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 166590033 (or 166590031 counting only the distinct ones).

The product of its (nonzero) digits is 4354560, while the sum is 50.

The spelling of 66026220752660 in words is "sixty-six trillion, twenty-six billion, two hundred twenty million, seven hundred fifty-two thousand, six hundred sixty".