166255126647 has 8 divisors (see below), whose sum is σ = 221937717120. Its totient is φ = 110704643640.

The previous prime is 166255126603. The next prime is 166255126673. The reversal of 166255126647 is 746621552661.

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

It is not a de Polignac number, because 166255126647 - 2¹⁶ = 166255061111 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 166255126647.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166255126747) 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, 33023929 + ... + 33028962.

It is an arithmetic number, because the mean of its divisors is an integer number (27742214640).

Almost surely, 2^166255126647 is an apocalyptic number.

166255126647 is a deficient number, since it is larger than the sum of its proper divisors (55682590473).

166255126647 is an equidigital number, since it uses as much as digits as its factorization.

166255126647 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66053733.

The product of its digits is 3628800, while the sum is 51.

The spelling of 166255126647 in words is "one hundred sixty-six billion, two hundred fifty-five million, one hundred twenty-six thousand, six hundred forty-seven".