166766131 has 8 divisors (see below), whose sum is σ = 193714784. Its totient is φ = 140598720.

The previous prime is 166766051. The next prime is 166766137. The reversal of 166766131 is 131667661.

166766131 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 166766131 - 2¹⁹ = 166241843 is a prime.

It is a super-2 number, since 2×166766131² = 55621884897418322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (166766137) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 194850 + ... + 195703.

It is an arithmetic number, because the mean of its divisors is an integer number (24214348).

Almost surely, 2^166766131 is an apocalyptic number.

166766131 is a deficient number, since it is larger than the sum of its proper divisors (26948653).

166766131 is an equidigital number, since it uses as much as digits as its factorization.

166766131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 390621.

The product of its digits is 27216, while the sum is 37.

The square root of 166766131 is about 12913.7961498546. The cubic root of 166766131 is about 550.4306610428.

The spelling of 166766131 in words is "one hundred sixty-six million, seven hundred sixty-six thousand, one hundred thirty-one".