66651220522 has 8 divisors (see below), whose sum is σ = 100356971616. Its totient is φ = 33198896652.

The previous prime is 66651220507. The next prime is 66651220549. The reversal of 66651220522 is 22502215666.

66651220522 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 an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 63356148 + ... + 63357199.

It is an arithmetic number, because the mean of its divisors is an integer number (12544621452).

Almost surely, 2^66651220522 is an apocalyptic number.

66651220522 is a deficient number, since it is larger than the sum of its proper divisors (33705751094).

66651220522 is a wasteful number, since it uses less digits than its factorization.

66651220522 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 126713612.

The product of its (nonzero) digits is 86400, while the sum is 37.

The spelling of 66651220522 in words is "sixty-six billion, six hundred fifty-one million, two hundred twenty thousand, five hundred twenty-two".