166566957704 has 64 divisors (see below), whose sum is σ = 363028848000. Its totient is φ = 70167513600.

The previous prime is 166566957701. The next prime is 166566957721. The reversal of 166566957704 is 407759665661.

166566957704 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×166566957704² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (166566957701) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5213972 + ... + 5245820.

It is an arithmetic number, because the mean of its divisors is an integer number (5672325750).

Almost surely, 2^166566957704 is an apocalyptic number.

166566957704 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 166566957704, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (181514424000).

166566957704 is an abundant number, since it is smaller than the sum of its proper divisors (196461890296).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

166566957704 is a wasteful number, since it uses less digits than its factorization.

166566957704 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33454 (or 33450 counting only the distinct ones).

The product of its (nonzero) digits is 57153600, while the sum is 62.

The spelling of 166566957704 in words is "one hundred sixty-six billion, five hundred sixty-six million, nine hundred fifty-seven thousand, seven hundred four".