166516271644 has 6 divisors (see below), whose sum is σ = 291403475384. Its totient is φ = 83258135820.

The previous prime is 166516271611. The next prime is 166516271683. The reversal of 166516271644 is 446172615661.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20814533952 + ... + 20814533959.

Almost surely, 2^166516271644 is an apocalyptic number.

It is an amenable number.

166516271644 is a deficient number, since it is larger than the sum of its proper divisors (124887203740).

166516271644 is a wasteful number, since it uses less digits than its factorization.

166516271644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41629067915 (or 41629067913 counting only the distinct ones).

The product of its digits is 1451520, while the sum is 49.

The spelling of 166516271644 in words is "one hundred sixty-six billion, five hundred sixteen million, two hundred seventy-one thousand, six hundred forty-four".