166725648767 has 16 divisors (see below), whose sum is σ = 171107768832. Its totient is φ = 162367208640.

The previous prime is 166725648709. The next prime is 166725648769. The reversal of 166725648767 is 767846527661.

It is a cyclic number.

It is not a de Polignac number, because 166725648767 - 2¹⁴ = 166725632383 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 (166725648769) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 23002538 + ... + 23009784.

It is an arithmetic number, because the mean of its divisors is an integer number (10694235552).

Almost surely, 2^166725648767 is an apocalyptic number.

166725648767 is a deficient number, since it is larger than the sum of its proper divisors (4382120065).

166725648767 is an equidigital number, since it uses as much as digits as its factorization.

166725648767 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8798.

The product of its digits is 142248960, while the sum is 65.

The spelling of 166725648767 in words is "one hundred sixty-six billion, seven hundred twenty-five million, six hundred forty-eight thousand, seven hundred sixty-seven".