166215275 has 12 divisors (see below), whose sum is σ = 209185272. Its totient is φ = 130986240.

The previous prime is 166215263. The next prime is 166215293. The reversal of 166215275 is 572512661.

It is not a de Polignac number, because 166215275 - 2¹⁴ = 166198891 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 47942 + ... + 51291.

It is an arithmetic number, because the mean of its divisors is an integer number (17432106).

Almost surely, 2^166215275 is an apocalyptic number.

166215275 is a deficient number, since it is larger than the sum of its proper divisors (42969997).

166215275 is an equidigital number, since it uses as much as digits as its factorization.

166215275 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 99310 (or 99305 counting only the distinct ones).

The product of its digits is 25200, while the sum is 35.

The square root of 166215275 is about 12892.4503101621. The cubic root of 166215275 is about 549.8239381368.

The spelling of 166215275 in words is "one hundred sixty-six million, two hundred fifteen thousand, two hundred seventy-five".