166516606406513 has 16 divisors (see below), whose sum is σ = 182316317844096. Its totient is φ = 150827633773440.

The previous prime is 166516606406503. The next prime is 166516606406519. The reversal of 166516606406513 is 315604606615661.

It is a cyclic number.

It is not a de Polignac number, because 166516606406513 - 2²⁶ = 166516539297649 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (166516606406519) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3107981 + ... + 18511962.

It is an arithmetic number, because the mean of its divisors is an integer number (11394769865256).

Almost surely, 2^{166516606406513} is an apocalyptic number.

It is an amenable number.

166516606406513 is a deficient number, since it is larger than the sum of its proper divisors (15799711437583).

166516606406513 is a wasteful number, since it uses less digits than its factorization.

166516606406513 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21622504.

The product of its (nonzero) digits is 13996800, while the sum is 56.

The spelling of 166516606406513 in words is "one hundred sixty-six trillion, five hundred sixteen billion, six hundred six million, four hundred six thousand, five hundred thirteen".