166521070734011 has 8 divisors (see below), whose sum is σ = 193150239828480. Its totient is φ = 140602012815528.

The previous prime is 166521070734001. The next prime is 166521070734077. The reversal of 166521070734011 is 110437070125661.

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

It is a cyclic number.

It is not a de Polignac number, because 166521070734011 - 2²⁶ = 166521003625147 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (166521070734001) 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, 177527793491 + ... + 177527794428.

It is an arithmetic number, because the mean of its divisors is an integer number (24143779978560).

Almost surely, 2^{166521070734011} is an apocalyptic number.

166521070734011 is a deficient number, since it is larger than the sum of its proper divisors (26629169094469).

166521070734011 is an equidigital number, since it uses as much as digits as its factorization.

166521070734011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 355055587993.

The product of its (nonzero) digits is 211680, while the sum is 44.

The spelling of 166521070734011 in words is "one hundred sixty-six trillion, five hundred twenty-one billion, seventy million, seven hundred thirty-four thousand, eleven".