666350255554 has 16 divisors (see below), whose sum is σ = 1037532222720. Its totient is φ = 320626266480.

The previous prime is 666350255531. The next prime is 666350255591. The reversal of 666350255554 is 455552053666.

It is a happy number.

It is a super-3 number, since 3×666350255554³ (a number of 36 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 30010089 + ... + 30032284.

It is an arithmetic number, because the mean of its divisors is an integer number (64845763920).

Almost surely, 2^666350255554 is an apocalyptic number.

666350255554 is a deficient number, since it is larger than the sum of its proper divisors (371181967166).

666350255554 is a wasteful number, since it uses less digits than its factorization.

666350255554 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60042585.

The product of its (nonzero) digits is 16200000, while the sum is 52.

The spelling of 666350255554 in words is "six hundred sixty-six billion, three hundred fifty million, two hundred fifty-five thousand, five hundred fifty-four".