666146850188 has 24 divisors (see below), whose sum is σ = 1197299716032. Its totient is φ = 324061755264.

The previous prime is 666146850163. The next prime is 666146850221. The reversal of 666146850188 is 881058641666.

It is a happy number.

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, 9209981 + ... + 9282027.

It is an arithmetic number, because the mean of its divisors is an integer number (49887488168).

Almost surely, 2^666146850188 is an apocalyptic number.

It is an amenable number.

666146850188 is a deficient number, since it is larger than the sum of its proper divisors (531152865844).

666146850188 is a wasteful number, since it uses less digits than its factorization.

666146850188 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 134561 (or 134559 counting only the distinct ones).

The product of its (nonzero) digits is 13271040, while the sum is 59.

The spelling of 666146850188 in words is "six hundred sixty-six billion, one hundred forty-six million, eight hundred fifty thousand, one hundred eighty-eight".