166252471607 has 4 divisors (see below), whose sum is σ = 170118808200. Its totient is φ = 162386135016.

The previous prime is 166252471579. The next prime is 166252471639. The reversal of 166252471607 is 706174252661.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 706174252661 = 241 ⋅2930183621.

It is a cyclic number.

It is not a de Polignac number, because 166252471607 - 2²⁰ = 166251423031 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166252431607) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1933168232 + ... + 1933168317.

It is an arithmetic number, because the mean of its divisors is an integer number (42529702050).

Almost surely, 2^166252471607 is an apocalyptic number.

166252471607 is a deficient number, since it is larger than the sum of its proper divisors (3866336593).

166252471607 is an equidigital number, since it uses as much as digits as its factorization.

166252471607 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3866336592.

The product of its (nonzero) digits is 846720, while the sum is 47.

The spelling of 166252471607 in words is "one hundred sixty-six billion, two hundred fifty-two million, four hundred seventy-one thousand, six hundred seven".