166521351346 has 64 divisors (see below), whose sum is σ = 291645768960. Its totient is φ = 69838433280.

The previous prime is 166521351329. The next prime is 166521351371. The reversal of 166521351346 is 643153125661.

166521351346 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 114133165 + ... + 114134623.

It is an arithmetic number, because the mean of its divisors is an integer number (4556965140).

Almost surely, 2^166521351346 is an apocalyptic number.

166521351346 is a deficient number, since it is larger than the sum of its proper divisors (125124417614).

166521351346 is a wasteful number, since it uses less digits than its factorization.

166521351346 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2339.

The product of its digits is 388800, while the sum is 43.

The spelling of 166521351346 in words is "one hundred sixty-six billion, five hundred twenty-one million, three hundred fifty-one thousand, three hundred forty-six".