666506550124 has 12 divisors (see below), whose sum is σ = 1166401517400. Its totient is φ = 333248973728.

The previous prime is 666506550121. The next prime is 666506550137. The reversal of 666506550124 is 421055605666.

It is a super-2 number, since 2×666506550124² (a number of 24 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (666506550121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 713134 + ... + 1357045.

It is an arithmetic number, because the mean of its divisors is an integer number (97200126450).

Almost surely, 2^666506550124 is an apocalyptic number.

It is an amenable number.

666506550124 is a deficient number, since it is larger than the sum of its proper divisors (499894967276).

666506550124 is a wasteful number, since it uses less digits than its factorization.

666506550124 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2150672 (or 2150670 counting only the distinct ones).

The product of its (nonzero) digits is 1296000, while the sum is 46.

The spelling of 666506550124 in words is "six hundred sixty-six billion, five hundred six million, five hundred fifty thousand, one hundred twenty-four".