166366507215 has 16 divisors (see below), whose sum is σ = 267222162528. Its totient is φ = 88383553536.

The previous prime is 166366507123. The next prime is 166366507243. The reversal of 166366507215 is 512705663661.

It is not a de Polignac number, because 166366507215 - 2¹⁰ = 166366506191 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 21574162 + ... + 21581871.

It is an arithmetic number, because the mean of its divisors is an integer number (16701385158).

Almost surely, 2^166366507215 is an apocalyptic number.

166366507215 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

166366507215 is a deficient number, since it is larger than the sum of its proper divisors (100855655313).

166366507215 is a wasteful number, since it uses less digits than its factorization.

166366507215 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43156298.

The product of its (nonzero) digits is 1360800, while the sum is 48.

The spelling of 166366507215 in words is "one hundred sixty-six billion, three hundred sixty-six million, five hundred seven thousand, two hundred fifteen".