166521351347 has 16 divisors (see below), whose sum is σ = 181214761728. Its totient is φ = 152099454240.

The previous prime is 166521351329. The next prime is 166521351371. The reversal of 166521351347 is 743153125661.

166521351347 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 166521351347 - 2²⁸ = 166252915891 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 166521351298 and 166521351307.

It is not an unprimeable number, because it can be changed into a prime (166521351397) 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 15 ways as a sum of consecutive naturals, for example, 1669472 + ... + 1766402.

It is an arithmetic number, because the mean of its divisors is an integer number (11325922608).

Almost surely, 2^166521351347 is an apocalyptic number.

166521351347 is a deficient number, since it is larger than the sum of its proper divisors (14693410381).

166521351347 is a wasteful number, since it uses less digits than its factorization.

166521351347 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 98330.

The product of its digits is 453600, while the sum is 44.

The spelling of 166521351347 in words is "one hundred sixty-six billion, five hundred twenty-one million, three hundred fifty-one thousand, three hundred forty-seven".