166377639125 has 16 divisors (see below), whose sum is σ = 207676717248. Its totient is φ = 133078122000.

The previous prime is 166377639107. The next prime is 166377639137. The reversal of 166377639125 is 521936773661.

It is not a de Polignac number, because 166377639125 - 2¹⁰ = 166377638101 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 593270 + ... + 827480.

It is an arithmetic number, because the mean of its divisors is an integer number (12979794828).

Almost surely, 2^166377639125 is an apocalyptic number.

It is an amenable number.

166377639125 is a deficient number, since it is larger than the sum of its proper divisors (41299078123).

166377639125 is an equidigital number, since it uses as much as digits as its factorization.

166377639125 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 239909 (or 239899 counting only the distinct ones).

The product of its digits is 8573040, while the sum is 56.

The spelling of 166377639125 in words is "one hundred sixty-six billion, three hundred seventy-seven million, six hundred thirty-nine thousand, one hundred twenty-five".