166651707573 has 48 divisors (see below), whose sum is σ = 268070100480. Its totient is φ = 99117862272.

The previous prime is 166651707571. The next prime is 166651707613. The reversal of 166651707573 is 375707156661.

166651707573 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 166651707573 - 2¹ = 166651707571 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166651707571) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 214908 + ... + 616026.

It is an arithmetic number, because the mean of its divisors is an integer number (5584793760).

Almost surely, 2^166651707573 is an apocalyptic number.

166651707573 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

166651707573 is a deficient number, since it is larger than the sum of its proper divisors (101418392907).

166651707573 is a wasteful number, since it uses less digits than its factorization.

166651707573 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 401258 (or 401255 counting only the distinct ones).

The product of its (nonzero) digits is 5556600, while the sum is 54.

The spelling of 166651707573 in words is "one hundred sixty-six billion, six hundred fifty-one million, seven hundred seven thousand, five hundred seventy-three".