660220352554 has 32 divisors (see below), whose sum is σ = 1154998368000. Its totient is φ = 282928559760.

The previous prime is 660220352549. The next prime is 660220352633. The reversal of 660220352554 is 455253022066.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10443019 + ... + 10506049.

It is an arithmetic number, because the mean of its divisors is an integer number (36093699000).

Almost surely, 2^660220352554 is an apocalyptic number.

660220352554 is a deficient number, since it is larger than the sum of its proper divisors (494778015446).

660220352554 is a wasteful number, since it uses less digits than its factorization.

660220352554 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 78323 (or 78309 counting only the distinct ones).

The product of its (nonzero) digits is 432000, while the sum is 40.

The spelling of 660220352554 in words is "six hundred sixty billion, two hundred twenty million, three hundred fifty-two thousand, five hundred fifty-four".