666604250551122 has 16 divisors (see below), whose sum is σ = 1435763001187200. Its totient is φ = 205109000169552.

The previous prime is 666604250551121. The next prime is 666604250551171. The reversal of 666604250551122 is 221155052406666.

It is a super-2 number, since 2×666604250551122² (a number of 30 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (666604250551121) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4273104170122 + ... + 4273104170277.

It is an arithmetic number, because the mean of its divisors is an integer number (89735187574200).

Almost surely, 2^{666604250551122} is an apocalyptic number.

666604250551122 is an abundant number, since it is smaller than the sum of its proper divisors (769158750636078).

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

666604250551122 is a wasteful number, since it uses less digits than its factorization.

666604250551122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8546208340417.

The product of its (nonzero) digits is 5184000, while the sum is 51.

The spelling of 666604250551122 in words is "six hundred sixty-six trillion, six hundred four billion, two hundred fifty million, five hundred fifty-one thousand, one hundred twenty-two".