166516265557047 has 16 divisors (see below), whose sum is σ = 255014142041600. Its totient is φ = 94674000228192.

The previous prime is 166516265556983. The next prime is 166516265557069. The reversal of 166516265557047 is 740755562615661.

It is not a de Polignac number, because 166516265557047 - 2⁶ = 166516265556983 is a prime.

It is a super-2 number, since 2×166516265557047² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166516265557847) 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, 19922975668 + ... + 19922984025.

It is an arithmetic number, because the mean of its divisors is an integer number (15938383877600).

Almost surely, 2^{166516265557047} is an apocalyptic number.

166516265557047 is a deficient number, since it is larger than the sum of its proper divisors (88497876484553).

166516265557047 is a wasteful number, since it uses less digits than its factorization.

166516265557047 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39845959902.

The product of its (nonzero) digits is 317520000, while the sum is 66.

The spelling of 166516265557047 in words is "one hundred sixty-six trillion, five hundred sixteen billion, two hundred sixty-five million, five hundred fifty-seven thousand, forty-seven".