66542052222826 has 32 divisors (see below), whose sum is σ = 101337298819200. Its totient is φ = 32766551928000.

The previous prime is 66542052222749. The next prime is 66542052222827. The reversal of 66542052222826 is 62822225024566.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (66542052222827) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 139127736 + ... + 139605196.

It is an arithmetic number, because the mean of its divisors is an integer number (3166790588100).

Almost surely, 2^{66542052222826} is an apocalyptic number.

66542052222826 is a deficient number, since it is larger than the sum of its proper divisors (34795246596374).

66542052222826 is a wasteful number, since it uses less digits than its factorization.

66542052222826 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 481230.

The product of its (nonzero) digits is 11059200, while the sum is 52.

The spelling of 66542052222826 in words is "sixty-six trillion, five hundred forty-two billion, fifty-two million, two hundred twenty-two thousand, eight hundred twenty-six".