166939847575 has 12 divisors (see below), whose sum is σ = 207011661120. Its totient is φ = 133547845760.

The previous prime is 166939847507. The next prime is 166939847587. The reversal of 166939847575 is 575748939661.

It is not a de Polignac number, because 166939847575 - 2³¹ = 164792363927 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 964506 + ... + 1124344.

It is an arithmetic number, because the mean of its divisors is an integer number (17250971760).

Almost surely, 2^166939847575 is an apocalyptic number.

166939847575 is a deficient number, since it is larger than the sum of its proper divisors (40071813545).

166939847575 is a wasteful number, since it uses less digits than its factorization.

166939847575 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 201626 (or 201621 counting only the distinct ones).

The product of its digits is 342921600, while the sum is 70.

The spelling of 166939847575 in words is "one hundred sixty-six billion, nine hundred thirty-nine million, eight hundred forty-seven thousand, five hundred seventy-five".