164959407666 has 12 divisors (see below), whose sum is σ = 357412049982. Its totient is φ = 54986469216.

The previous prime is 164959407647. The next prime is 164959407677. The reversal of 164959407666 is 666704959461.

It can be written as a sum of positive squares in only one way, i.e., 164353214025 + 606193641 = 405405^2 + 24621^2 .

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 5 ways as a sum of consecutive naturals, for example, 4582205751 + ... + 4582205786.

Almost surely, 2^164959407666 is an apocalyptic number.

164959407666 is an abundant number, since it is smaller than the sum of its proper divisors (192452642316).

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

164959407666 is a wasteful number, since it uses less digits than its factorization.

164959407666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9164411545 (or 9164411542 counting only the distinct ones).

The product of its (nonzero) digits is 58786560, while the sum is 63.

The spelling of 164959407666 in words is "one hundred sixty-four billion, nine hundred fifty-nine million, four hundred seven thousand, six hundred sixty-six".